Welcome!
First off, I would recommend purchasing this guide:
https://www.thedieselpage.com/t&rguide.htm
It has step by step instructions on head replacement, among other repairs, and is very valuable.
Yes, purchase the FelPro 6.5L head gaskets. They are the latest design and work best on all applications, including 6.2L versions.
Did you purchase head bolts or studs? The factory style head bolts are TTY (Torque To Yield) and cannot be reused. Studs are popular, but require finnicky install procedures to keep them from leaking coolant. If this simply a stock engine with no huge power upgrades, I would recommend going back with factory style bolts instead of studs.
I would not hone the cylinders. There is no need to unless you install new piston rings. Like you said, that would just be introducing more contaminants into the engine.
Casey
1995 K1500 Tahoe 2 door, 6.5LTD, 4L80E, NP241, 14 Bolt SF rear, 3.73's, 285/75R16 BFG K02's; 1997 506 block; Kennedy OPS harness, gauges, Quick Heat plugs, and TD-Max chip; Dtech FSD on FSD Cooler; vacuum pump deleted, HX35 turbo, Turbo Master, 4" Quadstar exhaust, F code intake; dual t/stats, HO water pump, Quadstar radiator and cooling fan/clutch combo; Racor fuel filter