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, 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.
Which of those games you know more? If you know football better, focus on football, otherwise bet on tennis games. It is a personal preference. It really makes no difference as long as you can make any of them work. If you don't know both then it is not going to be much different than playing dice for you because your guesses will be based on pure luck.