For your first attempt they are good. Try and concentrate on your sections either perfect squares, triangles or whichever pattern you use. Aim to leave a slight gap from the scalp and aim for neat rows. So all the rings are at the same height etc
Experiment with different hair weights 0.5, 0.8, 1g on different hair textures so you can see different results. The lighter weights on fine hair the 1g on thicker coarse hair. Take before and after pics so you can see how you improve 😄
If you have a dolls head practice as much as you can. It's even better if you can get real life models xx