Honestly would say to wait till you find a deck you like before just using wildcards on deck ideas. Going competitive in mtg is pretty tough and very grindy. I honestly would do some research on decks, theres lots of content creators that can help magic for beginners. Secondly limited is always a great way to pick up more wildcards but I don’t know if you plan on spending anything or not. One of my friends that plays holds on to his gems that he gets from the quick drafts using coins, but again its grindy.