Been reading this board for a while, so here is how I pick an online casino these days. After getting burned once or twice I stopped trusting the big banners.
First thing is the licence: see which authority is listed in the footer, and if your country is on the allowed list. Next come deposits and withdrawals: I want at least one fast e-wallet option, and the withdrawal limits need to be written clearly.
Never judge a site by the bonus alone. Anything above 40x rollover is a red flag for me, and live tables often do not count at all. A good recent review that covers all of this is worth a read here [url=https://legendary11.com/blogs/view/66300]Gamba Casino[/url] so you know what you are signing up for.
On mobile I mostly use the browser version, and a good site loads fast and does not log you out every five minutes. Test the live chat before depositing: if they answer in a couple of minutes that is a good sign.
Anyway, that is my routine. Only play with money you can afford to lose.