Once you understand automatics you never really want to go back to manuals don't get me wrong there's times I rather drive thems typically on any hill down or up. City drive sorry but screw you manuals I hate drivers enough you don't need me in a manual and putting up with bad drivers I am liable loose my cool and yank one them out beat the guy down wouldn't be my first time but thankfully that aggressiveness kind calmed down I save my anger only for the ring.
Anything else is overthinking it. Do not take the exact numbers I gave you for all trucks. Your particular truck, engine, trans etc all decides what your torque RPM will be and what your high horse power RPM will be (Not red line RPM)
Shifting in that range usually 400 rpm apart is where it likes to be.
I stopped driving OTR about 2002 early. but held on to my license and still active with big trucks as a crew boss until 2009. In 2006 they hired me to do yard jockey with a F9000 tractor and I docked that trailer in one move within a inch of where I wanted it to be the first time. The shifting fell into place 15 minutes later even though the two buildings I was supporting was about a half mile apart.
Like riding a bike. You will have it all come back to you soon enough.
Just be happy Super 10 transmissions are no longer in vogue other than that it is like riding a bike, no worries. I did like the suggestion of practicing in the bobtail, it can be tricky to float all 10 up and down. Once your smooth hook up and go.