Using movie maker, is not a bad thing, but it just limits the possibilities of what you can do to your videos. A program i recommend is Sony Vegas Pro 13, and their are alot of tutorials online on how to use it. But heres the catch, it is not free,and can cost upward to US$400. But dont fear,it is really simple to get a cracked version, and it is what i use for my videos(Check any new videos of mine to see what you can do).
Heres how to get it for free:Yttalk will not let me post a link, but just simply type into google: How to get sony vegas pro 13 for free.And you should be set! Hope this helped!