Having recently dabbled in crypto myself, and been burnt. may I suggest the following, before you start playing at crypto casinos:
1) Buy a cold storage wallet - Ledger Nano or such.
2) Create two accounts, a trading account and a storing account for each coin you plan to use.
3) Do some trades (buy crypto) and get used to the process involved and the method of transferring and converting crypto.
4) Only ever sign into your trading account. Store money in your secure storage account.
5) I use Phantom and Metamask wallets and have accounts with Coinbase and Crypto.com. All link with Ledger or can be sent crypto, between those and Ledger Live I get most things done securely now.
You may not need such an extravagant setup if you're only playing at casinos, some will convert your fiat money into crypto to play straight from your VISA or Mastercard, but many will cashout to a crypto wallet only.
Besides, if you consider branching out, buying NFTs, trading in crypto, playing crypto games etc, the above recommendations should keep you protected.
I am still a newbie, and have not actually played at a crypto casino yet, maybe some other members with more experience can help, but I consider my funds safe, now