If your managers cannot -- right now -- actually develop software, you're going to struggle. Software development is remarkably hard. Someone who has not done it may never be able to understand how hard it is.
Even an experienced manager -- with out-of-date technical skills -- can become a liability. The Java programmers hate hearing a manager complaining that "When we did this in COBOL it only took two weeks. What's your problem?"
If your managers don't actually get the technology first, then the management will be largely impossible. Sorting out what developers are struggling with. Understanding a status report. Determining the consequences of an "in-scope/out-of-score" decision is very, very hard without some technical background.
I'd suggest that they learn to code, test, debug and put into production -- by themselves -- before turning them loose on staff.
I'd suggest you find an architect to work with them and make sure they can actually do development before they try to manage development.
You can hope the get up to speed, but your startup may fail before they learn enough.
You can absolutely assure they get up to speed by asking them to build something that actually works. Not talk about building it. Or review someone else's case study on building it. But build.