You might take a look at this.
https://www.musiciansinstitutebookstore.com/product/guitar-technique-1/
FWIW, I’ve taught college and University and been teaching at two branches of a local school the last 3 years and what I found in one and one it really needs to be tailored to the student.
Assuming it’s not guys that start from zero a huge part I insist on is teaching time.
Most folks think they know what they need.
Want sure, need hell no.
Like the guys that want to burn but find a million reasons they can’t. Usually not the right genes, no talent, yada, yada, yada.
The reality usually is they are not willing to spend the required ass in seat practice time.
And aren’t practicing what is really needed.
So long before worrying about right hand technique comes learning to hear fast…in time.
For this it takes rhythm reading and singing/mumbling.
And it needs to be taken in small doses with grown ups since they usually find it embarrassing.