Nowadays, there are a lot of gigs that you can do to make money. Look around you, and there are so many possibilities to earn more income.
If you have a solid grasp of any subject, why not consider becoming a private tutor? You get good money for teaching kids.
If there is something you are good at, like content creation, graphic designing, animation, or any other technical skill, you would be able to find a market for yourself.
But the easiest way to get into blogging is to create a written blog targeted towards a specific niche. Targeting a specific niche makes it easier to engage an audience and get yourself the boost you require.
Babysitting has long been a traditional way of earning a few extra bucks. Most college students start working as a babysitter in their free time and generate extra money.