I think you're approaching this from the wrong direction. If you have the technical skills and some ideas, you can start proving them out and perhaps pursue one. But there are an awful lot of people with just ideas, most of them bad but not all, who need technical help. I would focus on finding someone how has worked on validation to the point where you're convinced they've got something, then try to join up. The validation is an important key, because it helps prove they're committed and bringing real value to the table. Previously this might have been enough for them to get funding and buy technical expertise, but with changing markets you investing your skills has much more value. If you follow this approach once or a few times you'll learn a lot about discovery and validation and then maybe have something you want to pursue completely independently.