How can Increase my level?, please guys help me.

Answer 1

To increase your level, you have to gain XP. There are several ways to do it: completing courses, winning challenges, getting badges, daily streak.
https://www.sololearn.com/discuss/940282/?ref=app
https://www.sololearn.com/discuss/1010166/?ref=app
https://www.sololearn.com/discuss/926301/?ref=app
https://www.sololearn.com/discuss/551490/?ref=app
https://www.sololearn.com/discuss/375998/?ref=app

Answer 2

For simple questions such as this you can safely refer to the FAQ:

https://www.sololearn.com/faq/#q12

P.S. Use question tagging feature wisely : )