Hi and Welcome to Etsy ! We all started out a bit dazed and confused :) Participating in Teams and Forums will help expose you to tips and instructions to help as well as getting your name out there for people to see. Etsy is a great hosting venue. You do have to promote your shop. Hand out business cards, share your shop with family, friends, coworkers, neighbors, anyone. Social medias, Fbook, Twitter, Pinterest, Wanelo, Craftori. Read the Etsy Sellers Handbook for info on shop set up and how-to's. Ask lots of questions. :)
Tags are important; they are what a buyer will use in the search bar to find your item. Use very specific 2 or 3 word phrases. If someone was looking for your "love" mug, how would they search ? Try: hand painted mug, typography mug, custom text mug, statement mug, mug with quote, custom lettered mug, hand lettered mug.
You are given 5 photo slots; using all of them will better your chances of selling. Take a model holding mug shot, a close up, different angles and lighting.
You are given 13 tag slots; for each slot you choose NOT to use, you are giving up a chance to be found.
Use some of the suggested tags in the search bar and find a similar mug. Read the description listed and check out what tags the seller used. Do any apply to your items?
Keep listing. There are millions of items for sale on Etsy. In very basic analogy, For each item you list, you have 5 photos and 13 tags that are chances to be found. 5+13=18 chances per item. List 10 items, you now have 10x18=180 chances. List 20 items, 20x18=360 chances. Add those to the number of people seeing your name on Teams, forums and in Treasuries as you participate and the chances go up. Best wishes~