Been reading this board for a while, so here is my short checklist for choosing a casino site. After a few bad experiences I stopped going by ads alone.
First thing is the licence: see which authority is listed in the footer, because some sites quietly block certain regions. After that I look at banking: card, e-wallets and bank transfer should all be there, and cashout times should be listed up front.
Never judge a site by the bonus alone. Wagering of 35x or 40x is normal, and some games count less towards it. A useful overview with bonus rules, app info and payment methods is here Gamba Casino and it saved me some time.
Most of my sessions are on mobile, and if there is an app I make sure it comes from the official page. Support matters too: a real human reply beats a bot loop.
Anyway, that is my routine. Set a budget and stick to it.