A few suggestions, dont know how helpful theyll be.
Give up milk, drink your coffee black. After an initial adjustment period, youll prefer it that way. It also avoids all the ethical and health issues of supporting the dairy conglomerates.
Try the pale blue top reduced fat milk. My very limited experience of green top is that it is harder to texture.
Use a stainless jug straight from the freezer - helps if you start with milk and jug really cold.
After the initial few seconds, move the tip very slightly lower under the surface, but not a far as you have been. May help get better microfoam.
Browse youtube and forums for videos - they often help as descriptions are nOwhere near as good as actually seeing it done.