Realistically how long until I notice changes?

I've been in the gym (this is week 3) my workout is 20-30 minutes on the stair machine, an hour on the treadmill usually max incline, 20 minutes on the elliptical and then 30 minutes of various weight training. My eating habit is once a day (chicken steak and veggies) under 1200 calories and then I go to the gym after eating.

I also do another mile walk at night before bed and started doing sit ups and push ups before bed.

I know this might be a weird workout but I'm curious if I'll notice changes in my body any time soon?