Hi,
I did my online application today for the RFC and it was pretty simple. At the end it was confirmed by email that I am now in a Virtual Queue. I picked Ciudad de Guzman as my location. I will then get an email with an appointment date.

I found how to do it online at https://immigrationtomexico.mx/what-is-an-rfc-and-10-steps-to-get-one/
Or just google how to get a RFC and the above link shows up on the search engine.
The instructions were very clear I thought.

I logged in later with my CURP number, name and email address to check my status and I believe it says I am third in line.

Anneli