Using a VPN could be part of the reason, I imagine they don't like people making accounts using one.
The best way I can think of is go to a library or something that uses a standard browser with a normal fingerprint, and is not on a VPN, and try signing up for a new account there using a new email address on gmail/yahoo or another 'normal' email provider. You want to look like a normal average user.
All the anti-fingerprinting and privacy stuff just makes you stand out more because there is less data being presented and makes you wildly different from the average user.
I am not in person social person but I really need a sense of community which is what I used Reddit for.
You're on Lemmy which has some of that! Also worth joining some discord groups for things you're interested in, or matrix if they are active (not very common).