highroll_exKlLong time lurker here, so here is my short checklist for choosing a casino site. After a few bad experiences I stopped trusting the big banners.
First thing is the licence: see which authority is listed in the footer, because some sites quietly block certain regions. Next come deposits and withdrawals: card, e-wallets and bank transfer should all be there, and cashout times should be listed up front.
Bonuses are the tricky part. Wagering of 35x or 40x is normal, and the bonus usually expires in a week or two. A decent independent write-up with the current terms is worth a read here [url=https://racetime.gg/team/casino-guide-taqbcbd]Winzter Casino[/url] so you know what you are signing up for.
I play almost only on my phone, and if there is an app I make sure it comes from the official page. Test the live chat before depositing: if they answer in a couple of minutes that is a good sign.
That is about it. Set a budget and stick to it.