Sup dixon,
I'm not the most knowlegable person on the matter but i am a qualified trainer... My advice to you would be to keep it simple while starting off.... First thing is first you need to asses your diet... If your a skinny prick like me naturally then roughly go off a diet consisting of:
2500+ calories
40% carbs ( bread, rice, pasta, noodles, potato, and other veggies) whole grain is the best
40%protein ( meat!!! fish, nuts, protein shake maybe) keep in mind red meat is high in saturated fats though)
20%fat (olive oil, flax seed oil, nuts, some from meats obviously)
Next is your routine... remember if you keep it simple its easier to stick too... exercise each body part 3 days a week in order of priority.... so lets say you more interested in upper body for the purpose of this routine...
stretch and warm up for 5-10 mins before you start. work out shouldn't really go for longer than 1 hour.
Bench press 3x12reps
Shoulder press 3x12
Squats 2x8
rows 3x12 (basically reverse benchpress)
bicep curls 4x12
tricep extension 2x15
leg extension 2x10
hamstring curls 2x10
abbs 3x20
This isn't the perfect program but it should give u a solid base to start off! Generally untrained people see results within 3 weeks and then more drastic results after 12weeks... if you haven't got a spotter take it easy with the amount of weight you use. Form is more important then weight. Exercises should be done slowly and in a way that you have complete control. I hope this all makes sense!