First off, you really need to play at casinos that are trustworthy. This means that they need to be regulated by the UKGC and ideally check also for reviews from other players and experts who know the industry. Another tip is to try games first - this means using virtual money while you’re still learning the ropes and getting a vibe of the game. When you can feel the pay-out coming, switch to real money. On a final note – play games which offer you the highest possible RTP, which would automatically increase your chances of winning.