Got a Huion H610 Tablet! How do I use it?

You'll ease into it. A true artist can use any tool to make something and the more you use the tool, the more proficient you'll become with it. One thing you should do with the tablet is that after using your program of choice, find out what buttons you use the most and which ones are more troublesome to find on a keyboard. For me, using Photoshop on a PC, it's second nature to do hotkey stuff like layer merging, copying, cutting, deselecting and undoing with my keyboard. Other hotkeys I use most often on my tablet are Rotate, Pan/scroll, Flip, screen switch (I have two monitors), Expand Selection and Contract Selection. But that's just me. Find out the most troublesome things you use most often and then figure out a way to hotkey it. But you pretty much gotta play with stuff and figure them out. It's your stuff, mess with it as much as you can and find out what tricks it can do.