how to reset my courses

Answer 1

It's a simple two step process:
1. Use the search function.
2. Do what the many, many, many, many threads you'll find tell you to do.

Answer 2

https://www.sololearn.com/discuss/2904904/?ref=app
https://www.sololearn.com/discuss/2914022/?ref=app
https://www.sololearn.com/discuss/2900960/?ref=app
https://www.sololearn.com/discuss/2840934/?ref=app