I got a short-ish stocky torso and long ass arms so I can relate.
From what I can tell, I’m triceps dominant, with triceps taking up about 2/3 of my arm and biceps about 1/3.
For forearms (they’re fairly important for the arms look imho), heavy grip work has done the job - deads, rows, chins, anything hanging from a bar. They grow.
For triceps, they do respond well to pressing movements - pressing stuff overhead, close grip bench, dips, pushdowns.
I didn’t really need to do anything specific for forearms and triceps since all this stuff is in my main routines already.
Now biceps, they’re small little assholes. Chins and rows did help to establish a base, but for them to grow I had to target them in isolation.
What I do is doing mostly neutral grip or supinated grip in chins, and alternating weighted and bodyweight - weighted for lower reps, bodyweight for higher reps.
Then, twice a week, at the end of the workout I slap in some bicep work (usually on lower body days), about 50 reps per time.
One day I’d go with barbell curls, either a single set of 50 reps with empty bar, or about 5x10 with a very moderate load - wrap the pussy pad on the bar to turn it into a fat bar for added awesomeness.
The other day I’d do EZ-bar curls with moderate load and sets of 10, or rope cable hammer curls in sets of 15-20.
Basically, being a noob, I try to hammer them with different load ranges and rep ranges to make sure I get some results.
And yes, I’ve added about 50 curls to my current program twice a week for a couple weeks and I’ve survived.
BTW what I found important is not to cheat, keep your body rigid and make sure your arms are doing the work, controlling the eccentric, don’t swing your body to throw the weight up and don’t make your shoulders do the job in place of the arms.
There’s a time for cheating, but it’s usually for people who already have a solid base and more experience.
I don’t use much progressive overload either on curls, for now I noticed that as long as my main work progresses and I handle heavier loads, I can use pretty much always the same weights for smaller isolation stuff and they still give improvements.