There is the Kodi Wiki for first time users.
I also have a few tutorials at the repository that might be of some help.
And then there is How to install CoreELEC
As well as our Guides and Howtos section.
If you have questions about the Kodi interface, such as for example where to find the option to unhide hidden files, and you’re not in a hurry for a reply, you can ask me.
It’s up to you how far you want to go with this, and there’s a bit of a learning curve. Give it a week and you’ll be playing with it.