How to get more challenges in a free version

Answer 1

https://www.sololearn.com/discuss/2548212/?ref=app
https://www.sololearn.com/discuss/2547956/?ref=app

Answer 2

Try to challenge many people in the Tap Community => Community Challenge. There you can choose some random people.

Also try this off topic question: https://www.sololearn.com/Discuss/864805/?ref=app

I hope this answer helps. Good luck!