ok look i had ur same problem i had ana accident and stayed for more than a year without a single movement and i began smoking a lot and my health was zero....
first quit all bad habits u r doing sleep early , sleep well, stop junk ,no bad habits..
second before u even think of training go get ur self agood diet read the stickies in the diet forum and post ur diet so ppl here can help u...
third about training ur workout must not last more than one hour maximum...also u r skinny ....don't try to over train to get fast results..results will come when ur body gets enough time and recourses (food & sleep) to recover and improve it's performance....
begin walkin for 30 minutes in the morning after an hour of breakfast...then increase the period , then start jogging for small period and increase ,then alternate between jogging and walking,, untill u can do long sprints...
after resting for a couple of days and feling good begin working out , do 4 example 4 sets of push ups and 4 sets of pullups and some crunches.....when u are able to do many reps using body weight exercises come again and read the stickies in the training forum and post here so ppl can help u with making a good workout.....
