You need to have a technique which is safe and more importantly, you have confidence in. It is the people whom are scared that often get bitten. I am not saying there is any one way to start a Tigermoth, just demonstrating the in front sequence.
A self start can be achieved, sure, but no pax on board. Simple instruction on removing chocks is fine and that leaves the pilot free to start and climb in, get settled, then call chocks away and have passenger climb in. albeit it is better to have a ground crew.