Also ask yourself, does my co-founder even want me touching the code and servers?
That or really stick to your guns and get into coding for real. It seems that the major problem is that you lack the proper motivation to learn. So why not ask your co-founder if there is some small aspect of the website that you could work on in your free time?
Get your co-founder to set you up on your own branch so you can work in isolation and learn how to do that small feature step by step. This way you'll have the motivation that your feature might someday make it into the final product. Just make sure to have your partner review your code and live with the fact it might not be good enough to use (yet).
Practicing on features used in real projects can really help you learn at lot.