I can tell you what not to do. Day trading hasn’t been profitable since the 00’s. Computer algorithms do so many trades so fast, they put an end to any logical trades for short termed gains. From what I hear, app gigs (Uber, Lyft, Door Dash, etc.) require so much time to be profitable, it’s essentially a full time job.
Absolutely do not fall for any sales job that requires you to put in money upfront (Ambit Energy, Amway, Primerica). These are multi-level marketing companies (MLM for short). They are essentially scams that make money on sellers being forced to pay fees for the products that they are selling and prey on people who are looking for a side hustle. Unfortunately, may kollel yungerlite and their rebbetzins get caught up in it.
If I can make a suggestion, spend time to learn a trade that can be done at home. Coding/programming is good, along with database management. There are always places looking to contract a part time coder to help with their app or something.