Overall, I tend to agree with Tim Henriques.
Firstly: Don’t get me wrong, but judging from your pics your triceps are just as much of a problem as your bis.
And tris make up most of the upper arm when developed (and of course they’re kinda handy when benching. Kinda)…
I wouldn’t junmp right into specialization or hi-frequency routines and such if you never really trained your arms progressively and directly before for any length of time.
Just do some standard stuff for starters and work up to the point where you put up some respectable numbers on arm-work.
It also doesn’t take a huge amount of exercises to make them grow, if you do a ton of volume (especially work-set-wise)then chances are that you’ll just end up stalling all the time/progressing very slowly…
I’d suggest that you have a look at the t-cell thread “best exercises for each bodypart” (or whatever it was called) and see what people recommend there… There were also arm-training threads in the cell.
Then pick a heavy press and maybe some sort of pullover/extension (or just extension… Careful with nosebreakers, PL’ers elbows get beat up enough as it is, you don’t need to provoke tendonitis even more)
and get as strong as you can on those for a moderate (press) to high(extension/pullover) amount of reps.
1-2 work sets (or maybe one DC rest-pause set, seeing as how both jackreape and Hanley seem to like those and are getting great results off them… Hanley does fully-fledged DC though at the moment) per exercise is just fine. The faster you can increase your working weight with acceptable form, the faster your arms grow…
At some point you could start alternating exercises there to keep progressing, but that’s a topic for another time.
If you stall and nothing’s moving despite increased calories and enough Protein in your diet… Then switch to a different movement of similar type until you stall there as well, then come back to the original exercise.
Same stuff for bis, pick one movement where most people can go fairly heavy (alt. curls starting in a hammer position, alt. hammer curls, pinwheel curls…) and one extra thing (preachers, incline offset curls, wide-grip low cable curls to chin or forehead with a wide-lat-pulldown attachment) and drive your strength up.
You can do all the super-sets and drop-sets and forced reps with 40 lb DB’s and a 225 lb Barbell that you want, the guy curling the 90’s for 6-8 with decent form and close-gripping 405 or more for 8 (both for 1 set) is going to have the bigger arms.