[Cr3aTor]

I think the only way to go about this in your situation is to learn basic html & css and use frameworks such as django for example. I would recommend it since it's pretty easy to get into it and it's not so advanced in regards to writing the code. If you don't have the time to do all of this, your hope would be to get help from a friend who knows backend or frontend and the rest is on your hands.

However, I think you should first write down a list of all the functionality of your website with respect to the backend aspect of it and then think about design.
Hope I was helpful, Cheers !