Hey dude, I'm similar to you in that I want to try everything at once, and flip flop around because I get worried about lagging body parts etc.
What I would suggest is the Boring But Big template for AT LEAST 3 rotations (12 weeks). Try and limit yourself to 1 assistance training exercise (I like to go for an antagonist movement to the main lift). So my Bench day would look like this: Bench 5/3/1, Bench 5x10+, Kroc rows 5x10+
I put the + to indicate that 10 is a target minimum, if I felt good, I'd shoot for more reps, but not at the cost of future sets.
Patience with BBB is key man....I'm telling you I legit got stronger everywhere. Chin ups? added about 15 reps to my max sets. Dips? can do sets of 10 with 40kg relatively easily now. C&J? stronger too, and much faster off the floor too. I'm not competitive lifter or anything special
If you're anything like me, almost try and forget about the assistance work, it doesn't matter compared to the barbell work. Try and go in with the mind set that you're only going to do the Big Lifts, then see how much you have left in the tank. If 5x10 seems like too much volume, give yourself the option of 3-5 sets, it will take the stress off of worrying about doing so many sets, but also let you push yourself when you're feeling good.
My assistance looked like this (if you care at all):
Press, (a) press 5x10+, (b) chin ups 5x10+
Deadlift, (a) deadlift 5x10, (b) ab wheel 5x10+
Bench, (a) bench 5x10+, (b) Kroc rows 5x10+
Squat, (a) squat 5x10, (b) calf raise 5x10+
Hope this helps in any way. Just stick at it man, Big Lifts = Big Results.....assistance is secondary