You will need to find a niche for the different types of jewelry that you will be selling. For example: if you mostly make wedding and event jewelry, start there and then branch out. If you want to sell everyday jewelry, or specific pieces like necklaces, bracelets, or earrings, you can divide these into separate categories in your store for ease of browsing. When selling jewelry online, you will need great pictures, and you will also want to include detailed descriptions.
Similarly, if you have a particular financial goal in mind, working a side hustle can help you get there more quickly. Imagine you're aiming to buy a home and need $20,000 for a down payment. If your current salary and expenses only allow for $300 a month in savings, and you manage to earn another $300 a month from a side hustle, you'll reach your goal in half the time.
I surprisingly get a lot of people asking to detail their car. I never intend to make a business of it, but I love doing it to my cars and people ask me to do it to theirs. All it takes is a cheap orbital buffer (mines a used craftsman) and a shop vac. I normally get easily $100 for a basic wash/wax/vac, or $200 to remove scratches and polish then wax the car.