Most of the actual keyboard options that are decent are much more expensive (and much larger) than an effects pedal for quick organ-style parts, and so I personally wouldn't bother unless you're committed to using those sounds a lot or specifically want to explore keyboard playing...
If you're interested, but not THAT interested, an old, used Hammond XK3C can be found for relatively cheap and is pretty good. Leslie sim isn't as good as like a Nord C2, but iirc people rate it as better than the one on the older Nords you're more likely to find for cheap-ish used.
If you want something compact and aren't picky about keys, the Yamaha Reface YC has a surprisingly nice Hammond + Leslie sound. The current price (at least in the US) makes that whole line harder to recommend now though, and they do have mini keys (though probably the only mini keys I've ever actually liked to play, so there's that), but if you find a good price they're nice and scratch that itch pretty well.
If you're wanting to spend a lot on a digital Hammond, I'd personally look at the newer Hammond stuff over the Nord ones. Though the spring action on the comparable Nords makes them better as "all around" keyboards, which may or may not matter if you're not a keyboard player to start with and don't plan on playing piano-style parts.
For home / studio use, you best bet is a keyboard controller and a decent plugin or two, which will sound way more realistic than any of these other options anyway.
