It sounds that you have been thru alot, and my prayers and thoughts are with you. Family and friends are great and you need them in your life. You need to follow your goals in life, and keep your chin up and move forward. Suicide and alcohol is not the way out, and I'm glad you didn't choose that path.
I think you should go thru with your dreams of getting your CDL. My wife's uncle is a truck driver and he does make a good living. He drove over the road for 5 yrs, and now has a local job with weekends off. He has some long days but he loves it.