I took a few decades off from RF/scanning/HAM and have only just returned as well - so I know what it's like trying to wrap your head around how the SDS200 works, as well as how ARC536 works. I just bought the SDS100, as well as ARC536, and it was only by playing with both ARC536 and Sentinel (the Uniden solution) that I finally figured things out enough to get my radio configured (mostly) how I'd like. It's work in progress...
As others have pointed out, "banks" don't exist on the SDS200. Instead, you have a Favourites List, which is not dissimilar to perhaps how you may sort your web browser links -- it's a folder, and within that folder, you can define various things like Conventional Frequencies, Digital Trunking systems, Talk Group IDs, UserIDs, and so on.
Each Favourite List can have a Quick Key associated with it -- but there are also System Quick Keys (which I'm still figuring out if/how I'll use) -- for me, it was easiest to start with Favourite List Quick Keys.
So, in my case, I've got a Favourite List dedicated to the local county fire association. That is just a folder which I call, cunningly, CFA.
Within that I've added a System for Conventional Frequencies, and within that System I've defined a number of frequencies which I know the CFA uses.
I've also added a digital trunking System to that same CFA folder, and within that system I've defined various Sites, the frequencies those Sites use (the trunking control channels for the most part), and so on. You can also define Departments, which are another way to group together frequencies or Talk Groups which have something in common. In my CFA example, there is a Department for all CFA Talk Groups, and then specific Departments for regional dispatch Talk Groups, and another department for Statewide Command.
I don't always make the best use of Departments, but, it also depends on the the Favourite List that I'm creating as to whether or not that's really useful or necessary.
For your example, it sounds like you may want to start with a Favourite List for Aircraft, and within that, define either digital or conventional systems which contain the frequencies and talk groups (as appropriate). You can also make use of the Department grouping to help keep things tidy -- this comes in quite handy if you're looking to only focus on one specific group of frequencies or talk group IDs.
The "aha!" moment for me came from using ARC536 to populate a new and empty Favourite List, and then I wrote that to my SDS100, and then read it back in with sentinel and got a better sense of how it all fits together. You'll get almost all of the same options in both software packages, but, the RadioReference integration in ARC536 was, in my experience and opinion, superior. But, I'm in Australia and RR isn't quite as complete as it is for the US and Canada...but it still let me work out how the SDS100 stores information, helped me ensure I had sensible Favourite List Quick Keys, had them properly enabled, and got listening relatively quickly.
Once you figure out how to make a Favourite List for one of the categories of scanning you mention, others may fall into place...good luck!
