You can watch the slots on YouTube for slight understanding but in most of the cases I would say they are luck based and you can't do anything except hitting the bet button and wait for the outcomes on your screen.You can surely check for the slots with different RTP and then select your favourite one to bet upon.Rest practical is best for understanding.
Playing the game with the demo/fun mode is a better option to do than watching youtube videos.
This way, you can understand how the game works better and it is the most effective way for beginners to try the games for the 1st time.
Coming up to strategy for a multiplier contest, choose game with the min bet as per the requirement and choose game with medium-high volatility.
For sure, limiting the budget is also important to make it worth the risk. Lets say the lowest prize of the contest is $50, it is better to spend no more than $50.
