Yes I like to sleep left side as the flow of blood supply to stomach is best - so that aids digestion better as I have indigestion issue. It’s ok to sleep on your back sometimes, but some mothers have big bellies by 2nd trimester and the weight and gravity of baby may cause pressure to the back, causing discomfort and some hindrance to blood flow.
I also like you, like to sleep c shape curled up. It’s ok to let the baby kick you, he or she can practice muscles and actions 🙂 so long as it doesn’t cause you too much discomfort. As they r already protected by your uterus lining and amniotic fluid. Some external pressure to the belly is fine, so long not too tight
Venus Sim