^ Id personally go with free weights to start with then use machines later. Now days i'll add in 3-4 few weeks at a gym to target a certain muscle and add in one or two machines into my workout but...
I had this problem with a few exercises then i started doing RC exercises before every workout i do now and not had a problem since. I always loosen the shoulders up now no matter what workout i do...
I highly doubt you work the doors or if you do your just a jacket filler, from your attitude you post you seem like the type that walks around with his badge 24/7. And size isnt a big factor on the...
you're going to look a right tit with just Arms and chest hope you know that. wont really look "big" as you'll have a tiny back and small shoulders with chicken legs. Goodluck.