Is there any work that allows you to work online, like mostaql (https://mostaql.com)

Answer 1

another option:
https://www.fiverr.com

Answer 2

i think you mean freelancer jobs.

Yes, i recommend the site Upwork, the best in my opinion

Answer 3

If you want to make a lot of quick money, you should go with Freelancer.com:
https://www.freelancer.com/