You are correct about the wide range of cards available. Unfortunately that is making it kind of confusing to me about what stuff is and is not compatible. Not really important to know right now but later on once I get some Amiga hours logged I will want to start tinkering.
its a brave new world

In general, for accelerator cards and stuff, look for stuff that has a number of 20xx.
Tradition is that a card or expansion tends to have the first part of the amiga model number in it.
For processor cards, the last 2 digits tends to indicate the processor in question.
So 1230 would be an 030 card for a 1200, while 2030 would be the same for a 2000
In general anyways