Mostly a reader, rarely post, thought I would drop how I pick an online casino these days. After trying maybe a dozen sites I stopped trusting the big banners.
First thing is the licence: see which authority is listed in the footer, and whether they actually accept players from your country. Next come deposits and withdrawals: crypto is a plus but not a must, and there should be no weird fees on cashouts.
Never judge a site by the bonus alone. Read the wagering and the max bet rule, and the bonus usually expires in a week or two. A good recent review that covers all of this can be found here this site before you deposit anything.
I play almost only on my phone, and a good site loads fast and does not log you out every five minutes. Test the live chat before depositing: slow or scripted answers usually mean trouble later.
Anyway, that is my routine. Only play with money you can afford to lose.