Don’t do this imo.
You can try YC co founder matching but that’s also filled with incompetent people at best or toxic snakes at worst who will waste your time end of the day, especially if you have made progress already.
Your best best (if you’re serious and not just a fan of calling yourself a FOUNDER) is to just learn, build, and sell.
Learn what you don’t know. Build what you can. You need to get comfortable being uncomfortable.
Your cofounder is probably burning out at a golden handcuffs job and might see your progress and want to join.
Don’t waste your time or worse equity (yes 1yr cliff and vesting, but still you’ll meet complete idiots who don’t understand anything who just waste your time) on randoms who are probably 5% as passionate about the problem you’re trying to solve.
Hire people if you need. There are loads of people who are open to work right now and you can hire them on fixed contract.