i have to say windows movie maker in its current form is a hideous piece of software and IMO not a good introduction to time line editing.... in that its fairly 'unique' in its concept.
Lots of folk in our video club use serif movie plus... previous version can be had for arounf £20
i haven't used it myself but have seen many tutorials at out club and it appears intuitive and more in line with typical nonlinear editing programs that you might want to up grade to once you become mire experienced.
others to consider are
Adobe Premiere elements
'No longer are the pleasures of Home Movie Making limited to those with ample funds. Now the man and woman of moderate means can join the sport'..... Kodak catalogue 1933