I can point you in the right direction, but it’ll take a couple of days to pull my notes together.You need access to a powerful computer - either your own, or in the cloud - with plenty of memory, 250GB or more disk storage and good internet bandwidth. There are a couple of cloud providers who offer free or cheap computing resource which is how I started off. I’ll give more information and links when I can
In the meantime have a look at this document. It’s the official guide on how to build /e/. That’s pretty much how I started.