Here are some ways to earn extra money online:
1. You can start doing simple jobs online as a freelancer on websites like freelancer.com, upwork.com,etc
2. You can become a contributor on Quora and share your knowledge with other users, I am active on Quora and i can answer your questions about digital currencies. I am also a Bitcoin broker and private investor so if you need business advice or assistance i can answer your questions.
3. You can create a channel on Social media platforms like Youtube,Instagram,etc and create video content about the things you know about.
Protip: You can choose to be paid in Bitcoin that way you can earn more as the bitcoin price gets higher
Here are some ideas to get you up and running. Let us know how it goes along the way, It will sure motivate others too, Cheers