It's not a real trading platform it's a spread betting platform so your trading against the house. Personally I think it's a bad idea.
If you're looking for a spreading platform this year, you can just try them out and see how it feels.
i have tried plus500 sometime ago, i'd say its legit if its still around. it does not convert , reporting system is weird, hard to tell if you ever made money and generally sucks. If I remember correctly their aff site is aff...500.com or something.
I also used it with those free money they give at start, they are just like forex, but weird, you can do much with start money. So you will need to invest real money in it, and thats why they give small amount at start. I would say, go with other trader platforms and start with like $200 and then try. But it isnt easy