Ok so if you want to make legs you start off with two curved lines but not too curved, and space them out but not too far. This will form the body shape of the person you are trying to make. Here is a ok example- it's nothing gross I just put it to 18+ since people are sensitive about leg skecthes

Then, when making the torso up from the curved legs that are going to be the thighs, make sure you squeeze it in but too much or it'll look like a hoe. just curve up from the legs like this

then make the legs bellow the thighs smaller like this

if you want more tips I can give you more