For most of us here, especially those employed, going all-in on a project with a new co-founder feels too risky. Nobody wants to end up without any income or with a partner who isn't a good fit.
But I feel there's a better way to go about it.
Pick your potential co-founder and do contract work for clients before starting with own project.
Since you both are aiming for your own business, freelancing should be easy. Combining skills gives extra leverage and you have plenty of time to get to know each other. And since you both work on the same contract, your income and time commitment would be well balanced.
What do you think?