Antigravity's Log

[Antigravity]

Hi, college freshman here, started this program 2 weeks ago.
5'10, 125 pounds, I'm rather skinny.

Week 1
L1D1 48
L1D2 2:17
L1D3 1:50
Week 2
L2D1 40
L2D2 4:34
L2D3 2:23

During pull ups I'm I supposed to extend my arms completely when lowering myself down? I can't manage to do that.
Anyway should I keep increasing the level of my workout?