One thing that might help, for chinups and pullups, rather than use the resistance machine, see if your gym has large elastic assistance bands. You loop them over the pullup handles and put one knee into the band. The benefit here is you still have to stabalize your body in space rather than resting your knees on a platform. The bands come in small/med/large resistance, so you can progress up to doing bodyweight pullup/chinups. I'm a larger guy (5'10 200) and have been training for about 7 months now, and before I was unable to do a single pullup/chinup, I can now do about 4 per set on pullup (widegrip) and 6 on chinup.
Also, I'd suggest moving up weight a bit in your squat if you are comfortable with the movement. Your heart should really be pounding at the end of a set and you should feel it in your legs the next day, especially if you are just starting out.
Good luck!
Also, I'd suggest moving up weight a bit in your squat if you are comfortable with the movement. Your heart should really be pounding at the end of a set and you should feel it in your legs the next day, especially if you are just starting out.
Good luck!