Confusing isn't it? The good part is you have enough planning time built in. But that extra time can also result in too much information!!
Keep your fingers crossed that
politically, you'll be able book and confirm the hunt, arrange and purchase airline tickets, confirm regional transportation, clear gun permits/VISAs and then be able to go. Things continue to get dicier and dicier, for hunters internationally.
A couple of things to consider in the preparation- reading, studying some background info on what to expect about the areas you may visit or hunt in southern Africa. I was serious about the longer dream safari! If you like to read, I'd suggest
Horn of the Hunter by Ruark and
Green Hills of Africa by Hemingway. One of the best buffalo hunting videos, IMO, is
Buffalo Hunters, The Mountain Challenge Part 1, done on Mt Loosimingor, Tanzania by PH Rainer Josch. Mt Loosimingor is THE "Green Hills of Africa" that Hemingway used for the title of his book. Independent sources including relatives and the late Harry Selby, confirmed that information. Here's a link to an excellent article by Joe Coogan in the NRA Hunter Mag about that.
https://www.americanhunter.org/articles/2018/6/27/finding-the-green-hills-of-papas-africa
Digging deeper into the history of hunting in Africa, you could also read both Bell and Selous. For more casual entertainment, it's hard to beat Capstick for a large volume of well written and easy-to-read books about hunting in Africa from various perspectives.
Conversely, if you are primarily only interested in videos of "shooting" buffalo, I guess Boddington's video,
Buffalo 2, is about the normal for that purpose.