Barbara - most of your items are lightweight items. Also, you are not that likely to sell a lot of multiple items at one time. Given those two things - you might just be better off giving flat rate shipping prices. You still need to be able to weigh your items all packaged up and ready to ship - buying the scale will not ever be wasted. But it would be simpler and easier for you.
You package up an item and weigh it. Then you go to the USPS website and use their shipping calculator. You put in your zip code and the farthest zip code from you. For instance I'm on the East Coast so I would use a zip code on the West Coast like California. And you use that as your shipping price.
For light items that go First Class it's the same shipping it anywhere in the country. For instance your bottle covers - You could charge $3 or $4 shipping and then you put in a with another item price like $1 or 2. If you have any items that are over a pound then you use the farthest zip code method. Everyone is charged the same price.
Then you pack up your items and take them to the PO to mail. You don't have to worry about printing shipping labels with postage - just print out or write out a label for the box and the PO will do the postage for you.
Calculated shipping is not automatic - as I said before it is entirely separate from shipping labels. It just gives more accurate shipping prices for those of us who sell a variety or items, in multiples often, and heavier items where shipping across the country can have vast differences in shipping prices.
This may not be what you need or want.
Set your own price shipping profiles
https://www.etsy.com/help/article/190?ref=shipping_mgr