Exercise? I am starting the gym with my bf, I am 14 weeks and 6 days. Never worked out before I am…

Exercise?

I am starting the gym with my bf, I am 14 weeks and 6 days. Never worked out before I am very small in size before pregnancy I was 108lbs and now 120lbs at a height of 5'6 but still not seeing any change in anything, my midwife said mild walking on treadmill is fine and the Elliptical. Now is there anything else I may be able to do while there? Are squats bad to do? If so if anyone else knows what I can and can not do please let me know....