I have 2 lefties – 1 very often wrote backwards when young… the other doesn’t seem to more than any other 3yo… (she is only 3 right now).
I tried starting cursive first with my left-handed, with a great program – and we were getting nowhere. So thes fall I started with Italics, and she is doing great. (she just turned 6.)
The main thing with left handed writers, is they must tilt their paper (the opposite than a RH person would) – and they must tilt it a fair bit… and this is even when they print. This stops their hand from going right over where they are writing, and also help prevent the “hook” hand which is very hard to write any amount with.
Just one other note for LH’ers – a piece of advice I got from a LH person (with a LH husband) – teach them to cut with scissors in the RH. It really makes a difference. They have more paper control (which is important doing precision cutting) – RH scissors are everywhere and LH scissors are often not available… and the scissors that are supposed to be for either hand are NOT. (the way the blades are don’t allow you to see properly while you cut. The person that gave me the advice is LH and cuts with her RH… her husband is LH and cuts with LH, and always has problems (no scissors, etc…)