AusBonsai

Hi everyone
I have a small blue spruce in a 4 inch bonsai pot that I I bought as a starter . I am wanting it to grow some hieght and then thicken the folage to create a nice cloud shape. Any advice on the best and fastest way to achieve this.

A large pot and lots of fertilizer amd a good open potting mix.
Patience as they are very slow growers.