new to K-pop and so confused

Hi everyone! I am completely new to kpop so bare with me if I sound stupid but I’ve recently gotten into skz and as a collector type I went right to looking to buy albums and got SO overwhelmed by how many different versions there are. I assumed it would be like collecting vinyls where there’s like one thing from each album, ep, single etc to collect but there are SO MANY versions I have no idea! Someone pls give me a skz album collecting for dummies guide lmao.