You made it sound like you only need autoguiding if you gonna use a mono camera.
Your DSLR imaging would improve from autoguiding too. Auto guiding is good for everything, including planetary imaging for people who want the best outcome.
There isn't a lot to learn really, PHD2 takes care of guiding if everything set up correctly.
Considering that small guider camera + guider scope will set you back about $150+- to sky is the limit price) , while if you have no experience with astro cameras, the guider camera will be a good introduction.
People will say get a mono guide camera, but I had just as much success with a color camera as well, and you can use the color guider as a planetary camera as well.
Today's cameras are much much more sensitive than even 5 years ago.
Also, you don't need the best of the best guide scope and camera. I'm using a $50 svbony 50mm and other times a $40 30mm mini finder scope as a guide scope. My camera is asi120mini, but for fun , I have used a $50 "eyepiece camera" from svbony (SV105) with limited exposure (500ms at top) and yet I was able to guide with it.
edit : BTW the prices currently are inflated for these items, I just checked. Whatever cost $50 6 months ago is $80 now. ridiculous is what's going on.
Edited by unimatrix0, 17 September 2021 - 01:11 PM.