Your best bet would be to start off here: https://www.upwork.com/hiring/education/getting-started-for-freelancers/
Those lessons are key, but they're not the whole story. You'll always want to be on the lookout for scams and such, but knowing how the platform works will go a long way to helping you avoid those people. And when in doubt, don't be afraid to ask here in the forums. We have plenty of people with a lot of experience that can provide valuable information when needed.
Bettye U wrote:
You seem to lack the writing skills necessary for academics.
Since when that's an issue on Upwork?
"Where darkness shines like dazzling light" —William Ashbless