Originally posted by: SociallyChallenged
Originally posted by: onlyCOpunk
Get a personal trainer, or take a weightlifting class. It's better to learn good form from the beginning then hurt yourself later.
The problem with personal trainers is that A LOT of them don't know what they're doing nowadays. Many rely on machine-work and don't teach correct form or ROM. The weightlifting class may be a good idea, however I've never been involved in one. What you can do to perfect your form is use the SS form guides and strive towards it. Then, record yourself, and ask for a critique at a reputable fitness forum(s). This should be a good start.
Also, I was 135-140 and 5'8" for a long time. In December of last year, I decided to bulk up. I now weigh 156ish. You can do it. It just takes time, exercise, and DIET. Eat a lot, make sure you get some good lean proteins and try not to get fat