Forum:New Collection?

I've been collecting for a three years now but a lot of my cards are in super bad condition because they were given to me. I've noticed the new zexal and 5ds, which i really like, and i was wondering should i start my own new collection and learn all the rules and stuff or just use the cards i already have ( i barely use any of them, only like 1/4 of the collection).

I need help!? =/