I don't think its a good idea. There's value in doing things from scratch when you are learning. It helps you learn to stay organized. There's plenty of people

I don't think its a good idea. There's value in doing things from scratch when you are learning. It helps you learn to stay organized. There's plenty of people who can tweak and cajole code into working. There's a lot fewer people who understand the principles behind software and can manipulate those principles to create what they want, instead of tweaking little bits of code and copy-pasting. Yes, most of your time in industry will involve working from an existing codebase, and a lot of time will be spent cajoling and tinkering, but if you have experience building semi-large projects from scratch, that isn't hard to pick up. Going the other way, on the other hand, forget about it.