LieutenantFalcon

TGT-VRP/PUP altitude is set relative to the steerpoint altitude ASL. If you want the VRP or the PUP (for some reason) to be below the steerpoint, use the (0-) MSEL key to set a minus before the altitude.
Afaik, this should also apply to the Offset Aimpoints (accessible through the DEST page, and good references for your pulldown and egress).
Example: TGT altitude is 400ft ASL, you want to set the PUP for 1500ft ASL. 1500-400 = 1100ft, which is what you enter.
                TGT altitude is 1200ft ASL (say a radio tower on a hill), VRP is a town at 400ft ASL. 400-1200 = -800ft
FWIW, planning all this is makes much more sense for VIP and not VRP. VIP is used for pop-up attacks where you use a landmark as your Visual Ingress Point as your navigation fix (pre-GPS) and set a fixed TGT based off of that landmark. Linked below is a great tool for that, although it doesn't support the newer maps sadly.
VRP is moreso for referencing something that comes up along the way in the mission and using the target (which you can see visually) as a reference point. Can't say I've found much of a use for it but hey.
I hope that helps

One thing: don't expect too much from the A-G radar. The pilots don't like it and don't use it much, it's a tiny radar. The most you'll get out of it is slaving it to landmarks and infrastructure, not individual ground units.
The DBS modes are reliant on you going off-angle. The further off angle you are, generally the better the image will become. Still, even then at short range with the highest manual zoom you can get (range scale on the top-left the lowest) you will still struggle to identify individual vehicle-sized units. It's best in this case to use the TGP in conjunction with the HMD

Pretty much every map short of the WW2 ones and Caucasus see actual F-16 operators, so you can pick whatever you want in that aspect.
South Atlantic has Chile which operates F-16AM/BMs and a couple of 16C/D block 50s without AMRAAMs, HARMs and L16.
Syria of course is the holy grail for F-16 flights, with plenty of combat service with Israel and with Coalition nations against ISIS, including block 50s from the USAF. Even for the older scenarios with Israel the block 50 makes for a decent stand-in when you disable the HMCS and turn off DL.
Persian Gulf has the UAE as an F-16C Block 60 operator. The USAF has a strong presence at Al Dhafra AB, though not with F-16s but they visit for exercises sometimes. The 480th FS was there in 2020 with their F-16s.
NTTR pretty much goes without saying. The USAF Weapons School at Nellis AFB uses all sorts of F-16 variants with the 16th WS. Red Flag exercises also bring plenty of F-16s around.
Marianas is in the same vane as PG. The USAF operates from Andersen AFB on Guam which hosts exercises involving the 13th and 14th FS F-16s from Misawa, as well as other PACAF F-16 squadrons from Korea and Alaska
/nerd
I can strongly recommend both Syria and PG for a realistic setting for the Block 50. The Gamblers campaign coming for the F-16 made by Baltic Dragon is set in Syria, and overall both maps have a lot of community content. 

Yep, they improved it to be a lot more similar to how it should be IRL. The CAT-III we had before was akin to flying an airliner even with little ordnance on, now it actually feels like a fighter even when you bring a heavy load. It's gonna take some getting used to, when you do get used to it it's a joy.