You just have to stick to legal, regulated online casino sites such as BetMGM, Caesars Palace Online Casino, FanDuel, Betway, bet365 and BetRivers. They offer great casino game ranges and they will pay out quickly and without any issues if you win.
Currently, only six states offer internet casino gambling: New Jersey, Connecticut, Delaware, Pennsylvania, Michigan and West Virginia. (Nevada offers internet poker but not online casino games; Rhode Island has passed an online casino bill, but it is not expected to go into effect until March 2024.)