Need Suggestions - Help From Expert

What Should I sell on Envato Marketplace to Earn Till Long Term?
Dear Authors, I’m New here. I can Do…

  1. Create WordPress Themes
  2. Create HTML Themes
  3. Create Shopify Themes
  4. Create PHP Based Website or Any Static website.

Q) Please Suggest What should I do Here to Earn 2000 Dollar Monthly? Where Should I start, From HTML Themes or WordPress Themes? in Which Type of category I choose eg. Blog, E-commerce, or Else. or Do anythings else?
Q) How to Promote and Sell more after submission of themes or code on envato marketplace?

or Should I Design Ios Emulator for Pc, I’ve also Skills in IOS Apps Development Suggest where Should i Focus