First of all welcome to the hobby, and I think you have made some great choices in your equipment so far. I know covering is a long ways away but lets talk about the colors you want to use. All the colors that you bought insignia blue, aluminium and black will look great together but also will make your plane very hard to see when its in the air on a clear day let alone a cloudy one. I recomend that you color at least the bottom of the plane (bottom of the wing, fuse and stabs) with a bright color no body will see it on the ground and you will be able to see it much better in the air.