I would suggest you do the World Cup tips for free, get yourself a bit of credibility and a record people can judge you on, then look ahead to the next season of the EPL, La Liga etc. There are so many free tipping sites out there, that there is really no need to pay unless you can (almost) guarantee winning. Even the best sites have losing bets, it's overall results that matter.
Like the look of this too. Games are always more interesting when you have a bit of skin in the game
Edit. I just checked out that bettin.gs site, good way of keeping track of bets. Only problem is when I inputted my World Cup bets, the date is registered as November 2018? Won't get too much credit if people think I placed the bets a few months after the tournament ended