how to proceed for initial sales?
How is that a technical issue?
Open shop - list items.
You have 3 items in one of the most saturated markets in existence. Good luck.
Expand planning and reading away from YouTube.
Technical Issues. Check you items for trademarks.
@fittercih: Your question is not a technical issue. You will probably find more help in one of the more appropriate forums such as https://community.etsy.com/t5/Marketing-Your-Business/bd-p/marketing?ref=gnav https://community.etsy.com/t5/Shop-Critiques/bd-p/shop-critiques?ref=gnav or https://community.etsy.com/t5/Etsy-Success/bd-p/etsy-success?ref=gnav
This forum is where others sellers take time out of their busy day to help you you need to respect this and first do some work and research for yourself .
Best place to start is the help section ( link top of the page )
start by asking
What can I sell on Etsy paying particular attention to prohibited items, copyright and IP.
then look for
How to set up shop.
SEO and marketing and how to get found on Etsy
There is much more info in the help section and seller handbook for you too.