I have been altering my FBW for about a month and finally have a routine that I am happy with. I have been properly exercising for around 1 and a half months and have seen some decent gains from being a skinny seventeen year old.
Three/four times a week I do:

Bent over rows 4 sets of 8-12
Bench press 4x8-12
Shoulder Press 4x 8-12
Bicep Curls 4x 8-12
Triceps extensions 4x 8-12
Forearm reverse curls 4x 8-12
Weighted squats 4x 14-18
Hamstring Ball rolls 4x 8-12
Calf Raises 4x 12-15
Weighted situps 4x 8-12

Just wondering if anyone had any comments or suggestions. Thanks

honestly, I'd drop both curls for now and the tricep extensions.

replace with either pull-ups, or lat pull downs. the rows and pull-ups will hit your biceps plenty for now.
bench press and shoulder press will hit the triceps.

I would add some kind of deadlift, or perhaps rack-pulls. you need some posterior chain work, more than squats can provide.

if you find that's too much for your back (fatigue) then do front squats. more target on the quads and less lower back.

i'd do something like crunches or leg raises for abs vs. sit-ups.

also taxing excercises to less taxing excercises.
i.e deadlift, squat, then others

in your case squats first, then all others