I finally made 100 sales! I never thought it could be so fast.
This is the 100th image sold:
It took me 9 months to fail uploading, understand what was wrong, upload more, start selling, build portfolio constantly, and now I have 321 images uploaded.
I can foresee more sales in less time as portfolio and exposure grows.
So, keep working and loving what you are doing.
Rejection is normal and makes you a better photographer/illustrator and a better seller.