You're doing the right thing. Im only 10 months out and if i could do it again there are a few things i'd do differently. Im with you on the letter writing, i don't write any but i did send txts to my family explaining my beliefs and WT's cult features and that i wish them no harm or ill.
Don't hold out any hopes of a normal family relationship in the future though. It'll only get you more and more frustrated. Don't tell them anything about your new life whether it be good or bad. Because they'll latch onto the bad and say "see what happens when one leaves Jehovah's organization".
This next year is gonna have so many changes but SO worth it i can tell you.