Just evaluating the free/paid profiles available is overwhelming!
With all the profiles available, you can make a career out of doing nothing but that. Or you can play guitar.
I'd recommend finding a few that cover the bases for you as quickly as possible. Then, once you have that done, you can focus on playing but periodically poke around to add new ones. In other words, don't wait to start enjoying the Kemper until you've explored all the profiles, or you'll be old and gray before you play your first note!
Now curious of what you bought in 73?
A $30 electric guitar (Kay, if memory serves) and a Sears Silvertone amp.
It did not sound like a Kemper.