If you are looking for an easy to work with react admin template. Use it. I - as a beginner - find it very well coded and can easily find my way around their structure. I've tried others as well, but this is the one that my tool is ending up being build in :)

The main reason for my liking is that is that they provide a "clean" version of the code. Pretty much only the structure and the rest is up to you.

Simply install both, the complete and clean version. Work in the clean version and copy from the complete versions codebase what you need :)

One piece of feedback, before you start: Make sure to update the packages listed. Old and outdated versions are still used.