highroll_exKlLong time lurker here, but I figured I would share how I pick an online casino these days. After getting burned once or twice I learned to read the small print first.
First thing is the licence: check who regulates the site, and whether they actually accept players from your country. Then payments: card, e-wallets and bank transfer should all be there, and there should be no weird fees on cashouts.
Never judge a site by the bonus alone. Wagering of 35x or 40x is normal, and live tables often do not count at all. A useful overview with bonus rules, app info and payment methods is worth a read here [url=https://snippet.host/axfsie]Winzter[/url] and it saved me some time.
I play almost only on my phone, so I check how the lobby works on a small screen. Ask support one simple question first: a real human reply beats a bot loop.
That is about it. Only play with money you can afford to lose.