SpeakCuba
Veteran
x2. I think it would still be a tiny bit early for COLL, but if you really want to learn ZBLL, then do what he said.You know COLL, right? If not, I think that could be a good first step, but I don't think it is required to learn other ZBLLs. I would say learn COLL early on if you want to do ZBLL.