Seeing that you just opened your shop and have 20 sales, you are doing very well in my opinion.
You may wish to join an SEO team to get more information on search relevancy advice. However, just taking a quick look at your tags, I think you can combine some one word tags into multiple word ones. Also there is a lot of repetition of the same words; eliminate them. Also try to use keywords relating to colour, use, where it fits,etc. Some ideas include: rustic, hostess gift, birthday gift, kitchen ware, home ware, serving jug, water jug, serving dish, fruit plate, etc.
Hope this helps and good luck with your lovely shop!
