Find a local makerspace and make friends there. They are usually a magnet for creative types. These people usually have a wide background of experience and often don't do their work specialty at the makerspace, so just judging people by their habits there isn't very accurate.
Makerspaces (aka: hackerspace, Fablab) are found all over the US in almost all major cities, most large cities, and quite a few smaller towns. These are usually places that have woodworking, metal working, 3D printers, laser cutters, pottery kilns, electronics, programming, and more. Not all of them have the same stuff or even the stuff I just listed, but they all have the same basic idea behind them: creative people doing work. Usually it's either fun work as a hobby or home improvement work they don't have the tools for themselves, but there's also usually at least a handful that are trying to replace or supplement their day job. And any of this whole group of people are likely to be interested in doing a side project for a friend or for some side money.
However, don't expect to go there to "rent-a-person". Too often people come in and think they can hire the place to do manufacturing for them, or design a product off specs, or act like a temp agency. No, go there to make friends, learn about the space, learn about people and their abilities, and then approach individuals to see if they are interested in a project. Most times, the makerspace is a member run organization of volunteers. Very few have employees, except for the for-profit commercial versions. They are more of a community or group of makers that share tools, knowledge, and experience rather than a manufacturing company.
BTW, makerspaces can also be found all over the world, too. Many industrial countries are similar to the US in how easily they can be found, but can be harder to find, if they even exist, in less developed countries. Less developed countries would probably benefit most from these types of place, but I digress.
Here's one map that might help you find a location near you. (I'm not affiliated with this site, it's just the first one I could find.)
https://www.beautyandthebolt.com/makerspace-map
FYI, I've been a part of 2 makerspace, and am currently a member of one. I do everything I mentioned above about makerspaces (and more), but I also so software development and have done computer repair in the past for work. I've met mechanical, network, chemical, and electrical engineers, photographers, painters, graphic artists, inventors, business owners, and a whole lot more at makerspaces. I've also gone to functions to promote the makerspace that included business people, investors, community leaders, and other DIY type people. This type of networking can be indispensable when looking for people to help your business.
Getting into the business of running the makerspace can be frustrating, and I'd suggest trying to stay out of it, but that's off the target for this Answer.
