Why can't I upload other pics other than the solo learn ones plz fix this if you know how to upload other pics plz tell me how

Answer 1

You don't "upload" pics to Sololearn. You upload them to a public repo of your choice and simply put URLs to them in your <img src>

Answer 2

1- go to https://m.imgur.com/
2- create an account.
3- upload the picture that you want to host.
4- click on share and copy the link or just right click and copy image address