I think any of the "How to make a mogrt in After Effects" on Youtube will be a good reference to get started on building a mogrt. @R Neil Haugen's suggestion of Jarle's ebook is great to rely on for greater, in-depth mogrts instruction. It's free, so just download it to have on hand when you need it.
For After Effects general, there's a Learn window that will bring you through the basics. There's the After Effects User Guide if you prefer reading, and there's channels like Ben Marriott who includes download links to a project file on his tutorials.
If you need a quick tutorial on how to add the controls you want to this mogrt, it can be a good opportunity to learn through reverse engineering someone else's project file, just let me know.