Like Mike said, see if you can get a response from one of the guys who specializes in them. There's a pretty big divide between people on CB vs WC and taming, but if you approach them right the care is essentially the same, you're just looking at how "tame" of a lizard you'll end up with.
What seems to help the more arboreal species (at least, WC imports - CB babies don't seem to be fazed by much) is giving them lots of options. Hide and be warm, hide and be cold, essentially, lots of hidey holes and visual barriers. Let it settle in, get used to what's going on, before you ever try anything as far as interacting with it. They learn quickly, and after you spend the time with them they do learn the basic routine of care and just give you the eye as you work in their cage.
Keep them warm, and keep them humid (but not sopping wet). Lots of space, otherwise they will pace the cage and rub their nose. They like tiny hides to wedge themselves into. Be patient and don't push it. I think the biggest drawback is whether or not you'll be okay with it if you end up with a shy monitor that doesn't want anything to do with you. I've worked with some trees that would beg for food from anyone walking by, and some that would see just the slightest movement and hide. If you don't have the option to visit a wonderful local reptile store to wait for the right lizard to be up for sale, then it's the luck of the draw what the personality of the monitor you'll end up with is.
I agree with your thought to just go all in on a species you really enjoy than to "learn" on a species that you don't. Frank's formula of "heat em and feed em" works on pretty much everything. I suggest reading up on the proexotics basic FAQ, because it goes over a lot of the care that's more monitor-specific, and will help you fine tune your husbandry from snakes to an arboreal monitor.
Good luck!
~jen
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"We call them dumb animals, and so they are, for they cannot tell us how they feel, but they do not suffer less because they have no words."
- Anna Sewell (1820-1878)