Journey to becoming muscular.

Well like the topic says, I am looking to become muscular. Anyone that knows me in real life would see that as being almost impossible, but i am determined to accomplish this goal.
I am 6ft 4inches tall. I weigh about 145lbs. Now if you do the math or the mental picture then you will see why people would see this as impossible haha. I'm 20 years of age also. I've been this same height and weight for years now. I've also been involved in very many sports and was very good at every sport I did but with my metabolism it was hard to pickup weight and be that active. So, now that I am out of high school and getting ready to enter the military in November, I am trying to do a total transformation. I started to actually work out 4 days ago but still need advice and motivational speeches ya know? .
Now to let you guys know, I am using free weights, weight gainer, protein, creatine and testosterone boosters until I'm bulked up. I'll have no problem "toning" with my type of metabolism but right now it's just packing on weight that i'm focusing on.
At 145lbs and 6'4, I started out my first day of working out 4 days ago and it was horrific. I was so weak and got tired super fast. Not sure if that happens to everyone but it did to me. Now, just on day 4, I already feel stronger and can actually do sets without having to quit and take breaks. So, sort of a morale victory there. But, i do have free weights at my house and need some help. I have a bench, dumbells, curling bar, pullup bar. Now, how can i train my back? Also, how do i get more meat at the center of my chest haha, it's pretty much a bone covered with skin....right at the center of my pecs...Any other advice or motivational comments would be highly appreciated!! I'll post a "before" pic soon and an after pic after about 3-4 weeks.

 

you wont see much gains in 1 month! several youll definately tell the difference!

as for back

3x12 wide grip pullups
1 to failure

3x10 barbell rows

rear delt raises 3x12

pull overs 3x12

 

to make some good gains atleast needs 1 year i've came from 90kg fat none muscle to 71 kilos 16 inch arms 8 pack abs and a pretty big chest but im not there yet, i can add you on facebook if youneed help.

 

mate it atleast takes a year to get like 5 kilos of gain lol.

 

without the juice then if you juice up yeah ul'l make all kinds of gain

 

if you need motivation arnold is your boy.

 

lift heavy with pyramid reps and eat big with counting all of your macros.

 

goodluck!