No need to apologise for those writing skills. You write extremely well.

The homework aspect in theory helps with the University structure.

From what I’ve watched and read you are correct. It also creates excess methane which is captured and sometimes used for things like energy.

You could try italki. I’ve not used it myself but it’s got a good reputation.

If the website is selling physical goods it could be to prevent having to export. That can be anything from having to deal with different laws to just plain old more work with customs and everything.

You mean reference books?

It adds a lot of server space and traffic requirements so it’s probably better hosted externally.