If your frame can handle the width you could probably go up to 2.5" on those rims without any problems. The frame is the limiting factor here. More experience will help with the handling no matter the tire size or tread pattern or tire pressure, etc. Lower tire pressures will spread out the contact surface and lower your ground pressure effect just like a wider tire. But you still need to gain experience. Riding is a great way to stay in shape for other activities and I applaud you for that. Good luck