Short Wedding Program Thank You I Dont Know What Music Program To Use!? Please Help!?

I dont know what music program to use!? Please Help!? - short wedding program thank you

I need help. In attempting to music with my sisters first dance at the wedding mix. What do I do .. is taken as the songs build and cut them into shorter pieces, three times per day to 1 length. i Duno and this kind of program I need for nothing on my computer does not work when I try to do. I use a PC i Duno if this helps

oh and id prefer to buy rather than the actual product for reducing the burden, but even if you download-id still enjoy

THANK YOU IN ADVANCE !!!!!! :)