I feel you. Whenever I have extra funds after placing a bet on my usual sports, I always place a parlay bet on football which in the first place, I don't even know the game rules, game mechanics, and everything about that sport. I'm just depending on pure luck and if I lose it, just move on.
It all started when I luckily won a random bet on a football match way back years ago. It was a parlay bet and most of my selections are DRAW results. The odds on DRAW mostly at football matches are playing from over 3.00 to 5.00, obviously depending on what team is facing. Luckily, I hit those 5 parlay bets. I can't remember the total odds but I take home a big amount.
Since then, I'm hoping I can hit again a random parlay bet with only selecting a DRAW pick.