Am thinking of starting a betting journey and have hard experience in slots and other online gambling games which are risky because it requires a gambler to have some skills
Every gambling has it own risk but slots game doesn't require having some skill in gambling and the last time I checked what you need is to understand the rules of the game.
but in tennis or live football betting is all about predictions and luck?
Which will refer for a beginner should bet on tennis games or football which among the two is easy to forecast.
What I refer may not be the good one for you, and it is a decision you ought to make by yourself since it only you that understand which of the two games you have passion for and can easily make good predictions.