You can try it, but don't cry if it bricks.
The newish one I bought got GrapheneOS instead. That worked without a hitch, but it's got more than a few problems.
The browser doesn't handle dark mode well.
The launcher is primitive. Why didn't they just take Trebuchet?
I was also very used to pattern unlock.
Use some other browser if dark mode is really important to you.
I think the launcher is good and I can't think of anything to improve on it. I'm happy it's the default, but I'm sure you can switch to a different launcher if you want.
Pattern unlock is also not there because of security.
It didn't used to be like this but started maybe a year ago.