How much weight should a 14-year-old who weighs 95 pounds but is muscular lift as a beginner?

Not much, weight lifting can stunt growth if your body hasn't finished developing yet. Probably best to wait until you're a little older!

Hi,

I am 14 and I lift one armed (right) 15kg 10 times. Left 7kg 8 times.

Just Lifting both arms 35kg 10 times. I can't do anymore because I don't have anymore weights and the local Gym is £300.