Trust and problem solving go a lot further than just skills. You hire skills, you build something together with a co-founder. If I could write this in stone and hand it too you I would.
That said, having had the experience of having a co-founder that had all the passion, work ethic and trust and not the skill set, that didn't work out either. So, there is a balance. I mean you won't know everything either and co-founding requires skills you didn't even know you need and you need them fast - so adaptability is key.
You'll have to find out what skills they lack and they will need to do a lot more than just "tech" stuff if they are going to be your co-founder. It also matters what you are building.
I've worked with beginner electrical engineers that were awesome very trustworthy and hands on. They would figure stuff out. They were 10x better than the guy with experience and argued every 5 minutes about "his way." We got to MVP and shipped 25 samples, there was one costly mistake, but nothing worse than working with an expert you don't trust and can't talk too.