We have no idea about you (and as usual, the profile is bereft of details, including age).
How old are you?
What exercises have you been doing?
Are you paying attention to your diet?
I assume you're a guy?
What specific, concrete goals do you have?
Do you know your body type? Do you have a role model who has a similar body type?
If you don't have access to weights, your progress will someday be stopped (but you can do a lot with bodyweight).
Are you willing to work each and every body part, not just one or two (e.g., the ever popular chest and biceps?)
A lot of questions, but for 90% of us, this bodybuilding stuff isn't simple (despite the reputation of muscle guys being stupid oafs). It requires 100% committment, a dedication to learning about your body, a willingness to experiment, and a hell of a lot of patience. If you're in the blessed 10%, then anything you do in the gym and diet will yield results. But being a "skinny guy" already points to you being part of the majority. If you're in your testosterone prime (15ish-22ish), then yay! You've made it a little easier.
Are you ready? You have questions, this place has answers! You've gotten a lot of good information so far. Are you going to join us on our body building journeys?
Let us know at least some of the answers to my questions, and we might be able to be more specific. (In general, the more specific your questions and goals, the better the advice!)
"If there's nothing else that's relevant, I'll be leaving now"
"Today's mighty oak is just yesterday's nut that held its ground"