This way in practice

NOT like this: If you start by trying to be very moral, you still need to care for your own needs too and in most people that produces nasty counter movements to overly good willing primary arrangements. So those who start with compassion often end up being overly cruel.
Instead DO THIS: If you start by being purely selfish, preferably with a holistic view of the world, and only finish your deeds by making some quite small adjustments to your purely selfish plans so as to be roughly moral in major matters and fairly good willing toward others, you can often achieve almost perfect moral in practice without it being a burden of any kind.