Well to be honest with you gambling in any shape or form is rather risky. Its the fear of the unknown that's worrying.
Everyone likes to win but no one likes to lose.I admit theres 50/50 chance  both ways,losing and winning but thats the risk,,thats what's called gambling, you are playing with odds,more or less stacked against you.
I suppose a little flutter has'nt hurt anyone yet but do stick to what you can afford to lose than go in blindly.Take your time and start off with low amounts and when you win ,leave,never go chasing after what you have lost ,this is the unfortunate route many go down chasing their loss incurring more and more on the way.

Always bear in mind 2 points

play safe
play responsibly