I couldn't agree more. My humble suggestion: don't try to tackle too much at once.
I know you've said you don't want to do extract, and I can dig that. Although I do still mostly extract brews, I'm beginning to feel like others have mentioned: that I'm making Kool-Aid (add powder to water, stir, wait a bit, serve) rather than brewing. My first BIAB turned out OK (not great, mind you, but OK) and I'll be trying some more once the pipeline is full enough to be able to absorb a failure or two on the BIAB front. I, too, am pretty intimidated by the amount of learning and effort that it takes to make the leap from extract to all grain (BIAB or otherwise).
SO, my suggestion is to do enough homework to brew a decent beer, but realize you'll be learning as you go and just let the learning curve handle itself. Don't expect an award-winning batch the first time around, pick one (or at the most, two) things to change or improve on each batch.
SO, maybe your first brew is all extract with some steeping grains.
NEXT, do a partial mash/partial extract.
THEN, try a few BIAB batches.
THEN, if you feel like it, try going old-school all grain with the garage full of vessels and transfers and sparging and pH checking and all the other stuff (obviously, you can tell what step intimidates me the most).
MOST IMPORTANTLY: keep having fun. This is a hobby, and it's supposed to be something you enjoy. If you stop enjoying it, don't give up completely, just do whatever you need to do to make it easy enough so that it's fun again.
BREW ON!
Forgive me an analogy here...this is like saying
"Oh, you want to learn how to drive a standard shift transmission?"
"Well first you need to learn how to drive a car."
"So take the wheel from your friend a few times and see how that feels."
"If you don't die, maybe try out a few laps in the parking lot."
"Then, take some driving lessons on an automatic."
"Master the automatic. Get a few speeding tickets."
"Buy a new car. This time, WITH PADDLE SHIFTERS!"
"Pretend that's the same thing as a standard."
"Eventually you might be confident enough to try to learn how to drive stick."
"And thats how you drive stick."
Except in this case, the brewing process can't kill you and doesn't require a license.
Go all grain.