Started a t-shirt brand for fun but want to get a sale now, please advise

So I am new to the eCommerce world, being a younger guy none of my friends really have websites or experience with this so I am trying to find communities to help me! I opened a store almost as a joke and I decided I just wanted to get one sale just to prove it to myself. I have two Facebook ads I am working on making the best ROI I can. Any tips or advice would be nice. My website is ultralightmeme.com