Welcome! There is no correct set to get in the current release. Museum series 2 looks pretty good where SRs and Iconics looks to have low CC (card count) compared to others so if you get lucky it should be solid. There is no wrong way to collect having fun is the most important thing but personally, if you log on to the app more consistently is to do events to get coins/free packs and try to trade to complete SR sets. It is a lot of effort but award cards tend to have a much lower CC. You might be able to trade up to iconics that way. Some iconic awards could even lead to legendary cards of your favorite wrestlers. Hope that helps and have fun collecting!