im 14 im turning 15 in 4 months and i am 5 inches long and i am 6 ft?

about how many more inches do u thin my penis will grow and when im erect my penis sticks up like a banana…when i get older will this go away and when i get erect i get really hard.in movies i see men when penis is that almost flop when erect…..will i get softer as i grow?? and when i masturbate i cant control when i ejaculate…will this get better when i get older….and after lots of ejaculating and jelqing i developed a puffy ring under the head of my penis that is now black…will this go away.