I'd spend a good amount of time getting faster at 10 yard sprints.
Other than that since you haven't done much strength training, you'd do good to get into the weight room and start getting stronger. I think you need to build a decent strength base before you start specializing as any increase in strength at this point will only help you.
You could easily do a fullbody workout 3X a week depending on how often your practices are.
With each workout rotate
front squat, deadlift, back squat
bench press, military press, inc db bench press
chin ups, chest supported rows, seated cable rows
db lunges, db bulgarian squats, bb step ups
Throw in a 1-3 movements for biceps, triceps, shoulders if wanted.