I've been grooming Couver and Khloe for a while now and have been using the most basic trimmer and scissors. I have found that trial and error is the best way to learn. I usually just shave them down during the summer and do sanitary trims during the winter.
I'm hoping to upgrade to some a nicer trimmer soon... Just need to shop around and figure out what is best.
Good luck, it really isn't that hard to groom them yourself. You just need to practice... AND remember, it's just hair... it WILL grow back