Yes, almost any - there are a lot of online training courses for all tastes, there would be desire and perseverance. But I would not dare to become an "absentee" operator of a nuclear power plant, a pilot or a surgeon.
Many people here drown for copywriting, but this is such a flea catching for a small (and at first - very small) price, that oh. It is, of course, possible to find good and generous customers, but not on public exchanges, but in roundabout "offline" ways - by acquaintance, in other words.
Go to any freelance site and see what they require.
What you like best there and develop. Better choose what is best for you in the short term.
Explore new programs, tools, technologies.
Don't be afraid to try new things)
From simple to complex (conditionally of course)
Choose a profession closer to online shopping, and then your customers will be ready to pay.
We would add the answer:
By the way, guys do a lot of this while still in school!