Resolved Question: Good music sites for MP3 downloads?

I just got an MP3 player and know nothing at all about how to get music on them. (I am not a technical person at all. I am old and barely can use computer)

It is a 4G and is not an IPod kind of MP3 player. It is a Sandisk Sansa brand/kind.

I have no idea of places to download music from. Only interested in music. No videos (the MP3 doesn't have a video screen) and no other downloads.

I am mainly interested in gospil music, bigband music (music of the 1940's and WWII era), easy listening kind of music, and some oldies rock (1950's, 1960's and a little bit of the 1970's)

Thanks for any help you can give.......................