Here are some beginner decks you can play while you are in Pool 1. These decks are from the website marvel snap zone. The decks get updated every so often. You will not have every card in these decks right away but after playing for a day or so you will get more cards and have an understanding of the game to be able to fill in the cards you don't have with cards you do have. Plus, being creative can be fun!

https://marvelsnapzone.com/pool-1-decks/