How to use a selection as a layer?

[potentmedicine93]

This is probably something very obvious but I'm not really good with this software. I need to color a drawing on multiple layers, I've created a selection that delimitates the contour of the shape of the drawing (because I don't want colors to go out of this shape), and saved it as a channel. I want at least two layers, one that's just the "background" color that fills in the entire shape, and then another layer where I add new colors and details on top. I also want to be able to add these secondary colors by making a new selection and filling it in, but I want it to fill it in only within the shape selection (think of drawing a cirlce with the select tool and filling it in, but it only fills in the area of the circle that's within the saved selection).

So this is where I have trouble, I can fill in the selection to give my shape a background golor just fine, and I can load it up on any layer I want, but I can't use the "lock transparency" tool because I want the details layer to be "blank" since I'm coloring on top of the filled in shape, and I can't just load the selection to color within because I want to use the select tool to add new colors. Any suggestions?

[JJMack]

Convert the selection to a Path and then use a shape tool to turn the path into a shape layer. You can fill with a color, pattern, or gradient.. The shape layer can be stroked. You can lower the layer opacity to blend into lower layers using a blend mode. You van also edit the shape.