Hopping trains is pretty fucking dumb nowadays. Too many tweakers, crusties, etc. It was way safer decades ago when there was less law enforcement and less meth going around.
Just work a steady job for a fucking month and buy a greyhound discovery pass. Or better yet,
kayak.com can get you a transcontinent flight for like $300, $300 that will save you DAYS worth of waiting, having to buy food and other supplies, danger, dealing with cops and dickheads, uncertainty, etc. Hitching and rail hopping can "cost" more than taking a bus or flight.
Use your fucking head.