Judge my security of how I created my Bitcoin wallet

[NotATether]

I do not recommend Windows for storing Bitcoin inside a wallet because it can too easily be hacked. Create a Live USB containing Ubuntu (or even better - CentOS / Rocky Linux) and your wallet software because malware will not run on Linux so easily.

Exodus Wallet and any other closed source wallet apps are not recommended, especially Atomic Wallet which should be avoided like the plague!

I did not use the Coleman io generator offline, as it, if I understand would run in a browser. That means it would allow any browser to display the seed AND every single private key, meaning a browser could save that info as if it was a manual field entry, username, etc...
I also wanted to be able to connect to the internet at least twice just because it proves that if I wanted to, the seed works and so I can spend the BTC some day or simply pass it back to an exchange 20 years from now.

I actually recommend generating your seed phrase via the iancoleman generator, or through some other independent program like the method you used earlier, but the trick is that you must save the HTML file and then run it on an offline computer. This helps protect you from malicious software that gives you a handful of pre-calculated seed phrases that will inevitably get swiped. I'd even generate a hardware wallet seed that way as well.

Although this is not a substitute for verifying the signatures of your wallet software using PGP.

[Cricktor]

Frankly, OP's actions could be worse, but not by much. Well, there's always a deeper hole to dig.

A lot has been enumerated already as very questionable or rather very bad practices. I might have overread something here and there.

Here my bits and pieces. Don't use your daily driver as device for your crypto wallet (reading and answering emails: not good any near your crypto wallets (on the same device)). Daily shit surfing isn't any better. Web browsers, fake links in emails, questionable executable/active downloads are commonly the main intrusion vectors, lets not talk about zero-days and other vulnerabilities in SaaS OS crap.

I'm not entirely sure if OP actually keeps his wallet's mnemonic recovery words only in memory, despite a few hints to words he carries with him (another terrible practice). If he does, close to worst practice. It's almost guaranteed that something will be forgotten, especially when he doesn't use the words for some time.

A healthy human brain can memorize 12 or 24 or more words with the proper technique. But to keep it in memory 100% correctly you have to regularly repeat and replay. To check if you're still 100% right, you should have a correct written copy (better multiple redundant copies). The need for a surely correct written copy makes memorization pointless, unless you need to cross borders "naked", but that's only temporary.

Your whole setup is a security gamble and your coins or wallet not yet being stolen doesn't prove anything about your wallet's future. You already announced to accumulate more coins. If I were a bad guy and had a foot in the door to your device, I'd wait until you stacked up more coins. LOL!

Get a decent hardware wallet, stay away from the Ledger and other closed-source crap, learn and practice to use it safely, don't use crypto wallets on Windows OS, due to dominent market share the most targeted OS by malware.

Keep calm and hodl...  

[PrivacyG]

A healthy human brain can memorize 12 or 24 or more words with the proper technique. But to keep it in memory 100% correctly you have to regularly repeat and replay.

This is very valid.  I did not even think about this.  I am having a hard time every time I do not use one of my Cold Wallets for around an year.  I keep forgetting how things worked and what my passwords were.  It is very scary until you finally hit the right password.  It feels like you are about to realize you just lost your Bitcoin forever.

Hell.  We often forget what we ate yesterday.  Unless your mind plays games on you there is a big chance you will remember the Seed if you keep repeating it like you say.  But what if you do not.  It is enough to not remember a single word and you may start mixing the entire seed up in your mind.

To me, our minds are as useful for long term storage as an SD Card or a floppy disk around magnets.  You do not want to keep your Bitcoin in your brain.

And then think about it.  If you die tomorrow, no body will be able to even recover your Bitcoin.  It may be a donation to every one of us like Satoshi said, but I have to assume you would not want that.

[Cricktor]

Your wet bio brain as sole backup for your mnemonic recovery words or other secrets is plain irresponsible, period!

I'm an old fart and had my share of forgetting e.g. wallet encryption passphrases (fortunately so far only for value-less Testnet coins). But that taught me a lesson, even when I was almost 100% sure I knew how I "constructed" the encryption passphrase. After some time, I couldn't figure it out anymore and I was careless to not write it down properly or lost the note.

I was lucky, it didn't happen so far for me with precious real Mainnet bitcoins. Lesson learned, I document everything thoroughly (well, mostly, I hope, giggle).

Well, I didn't pull all strings to try to brute-force it by clues I know, but that's not guaranteed to succeed and not the point here.

You can forget everything, it's just a matter of time and little use or how hard your head gets hit or whatever may trigger severe amnesia (illness, drugs, ...).