I will attend a futsal game on Saturday. I like playing futsal. I'm not a good player yet, but playing with friends is fun for me. - I'm going to a futsal game on Saturday. (You could also say "I'm going to be playing in a futsal game on Saturday", if that information is correct.) I love playing futsal and, even though I'm not a good player yet, I still really like playing it with my friends. *This version is an alternative that could make your writing seem more natural.

I will attend a futsal game on Saturday. I like playing futsal. I'm not a good player yet, but playing with friends is fun for me.