Reloading is a great choice--glad you were able to get a lot of the stuff you need before the craziness hit.
As noted above, primers are hardest to find right now, but a some suppliers allow you to set a notification that will email you when they are in stock. Set them where you can, and move very quickly if you get a notification. Most states also seem to have a gun bulletin board system of some type. Find yours, create an account, and you'll often see people post when one of their local suppliers happens to get a delivery. Again, move quickly. For the most part, brand won't matter, and right now standard vs magnum primers won't matter a lot either, though the reloading manuals (or data on the powder maker's website) may have you adjust the powder charge slightly depending on the powder type. No big deal.
There are a lot of powders on the market, and for any given load you want to make you can probably find half a dozen with published load data. This isn't the time to fixate on finding one particular powder; keep your eyes open for any of those appropriate powder types to come up for sale, then move quickly. The great thing about loading handgun cartridges is that a pound of powder lasts a long time.
Cast bullets aren't too hard to find; for competition, that's almost all I use. Plated or jacketed equivalents do come up for sale from various suppliers from time to time, you just have to watch a lot of sources.
Prices may be elevated, but with some work you can avoid paying scalper prices for components you need.
And you can save a LOT. Manac noted that pre-pandemic savings might be small on 9 mm (and also on target shotshells) because those are sold in such large volumes, but I can still load .357, .44, .45 for about $8 a box with cast bullets, and those would typically run triple that pre-pandemic, and good luck trying to buy them at all now.
The biggest advantage for many shooters is that you can reload ammo that is significantly more accurate than factory ammo. It takes some work, experimenting with powder type and charge weight and projectile, but you'll eventually zero in on something that is just right for the particular harmonics of your barrel.
If you're set with enough components to start by all means do so. This isn't a hard hobby until you make it so, however, like aviation, it's very unforgiving of mistakes so do it with no distractions. 
