Hello, and welcome.

Yes, you have several stores and very few items in each.

You should have started with one store and made categories for each theme. You didn't have to put all six themes in one store, I suppose. That may not mesh well, but you could probably get at least two or three themes together.
For example, you could have made a store for greeting cards and made a separate category for birthdays, Father's Day, retirement, friendship, etc.

The more products you have, the easier your store and products are to be found. At this rate, you're really going the long way about, causing yourself to possibly be futher behind in sales than you could be.

You could have had about a dozen products in one store by now. That's still very few, but you'd move along much faster in the way of building up a store if you had just one.

In your birthday store, I see a shirt about retirement and a mousepad about being friends forever, both with the same image. I don't see any connection to birthdays, so it's confusing and misleading.

In your description, you say the items make nice gifts, but you haven't desscribed the design. What are we looking at on the mousepad? It's looks to be a man and a dog sitting on a bench, so you should say so. Not everyone will be able to see the computer screen and will have someone describe the design to them, and sometimes with certain designs, a person does need some detail in words to help them.

You have one tag word for that mousepad. You need a whole lot more than that. Tag words are used in getting your items found on the internet. If someone wants a mousepad with a man and a dog on it, they're most likely going to type in more than the word "friends", which is your only tag. Billions of links will pop up on the internet if you type in that one word, and I doubt that your mousepad will be listed right away.
You need to add words and phrases that are associated with the design, like friends forever, man and dog, man on a bench, man's best friend, friendship, friendship themes, black and white drawings, etc. Put the words in quotes "like this" or connect with a plus sign like+this to make phrases.

You can make store banners (with your store's name) for the tops of your pages.

When it comes to multiple stores, you can always add them later. Focus on one store, build yourself a nice large number of quality products, then go from there with expanding with other stores. I know that some themes don't connect well, so people do need or want separate stores. Nothing at all wrong with that. I have two stores. One is basically a variety store, the other is for wedding items.

You can look at mine and see what I mean about categories and themes, but there are others who have their's set up much nicer.

dreamNwish Wedding Designs

dreamNwish Photo Art & Gifts

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Good luck.

Thank you.

I'm glad you mentioned the changes and having to adapt. That's very true and a helpful piece of advice.

I would certainly work on one store to start with.
You can set your others to "make this store private" (in your account area in "settings") until you get one store established.

That is up to you. Then when you know more, and have a clear focus, you can open each new store and fill them up.

Just my opinion.
I wish you luck.