What type of coffees (beyond the roast levels) would you recommend in particular?
Caravels are amazingly rewarding RE the standard of coffee you use.
I can get a constantly "good" cup from very average beans (supermarket beans)
I can get a mind altering cup from specialty beans.
This is where different baskets come in. For supermarket beans it needs the largest basket. For something like Tim Wendelboe beans it has to be the small basket or it blows my brains.
Yes the grinder should work. I suspect that as Caravel has such a small basket and only under hand pressure, the more consistent the grind the better. I use an OE Pharos (version 1) and am happy with it. I have heard good things about the zero but never used it. I think grinders are like tv screens, there is always bigger and better...but they may not fit your budget or kitchen.
If you want to explore coffees and you are in an area that means you have to mail order...you may want to look at the menu from https://thenewblack.coffee/artisans
. Its a coffee shop in Singapore that specialises in roasts from around the world. If you are in Singapore, try them...TIP: don't do them all in 1 day.