Answer 1

No just as a beginner it is not required . Yes , but if you want you can prefare. I don't think so it is required because many of the talented persons on sololearn is without buying sololearn pro.

Answer 2

Hi, inspiration comes from searchbar. Please use it for common questions before posting again. It helps us to keep SL clean .

Answer 3

https://www.sololearn.com/discuss/2055102/?ref=app
https://www.sololearn.com/discuss/1639920/?ref=app
https://www.sololearn.com/discuss/1472300/?ref=app
https://www.sololearn.com/discuss/1471658/?ref=app