I've already learned a lot just this last week. What I would really like to do is to go down the pacific coast line, and I will probably have to start from Minnesota, to save money on travel to one coast or the other.
I would highly suggest you go southbound if you do the Pacific Coast. I had to do it northbound and would not recommend if you have a choice. The headwinds get old after a while going northbound.
You could always take a bus to Bellingham, WA on the west coast for about $100. Get on the bike and head down the coast, and turn left in San Diego and cross the country again on the Southern Tier. Start August 15th and end 97 days later in St. Augustine, FL in late November based on 50 miles per day. Then you double your ambition !
Congrats on working through your addiction and God Bless!
Have a great ride!