Hi There,
I charted out the Circle of Fifths for myself about 30 years ago. I use this chart to transpose keys, build chords and scales and such. Pretty basic, but I thought it would make understanding basic theory a little easier for some people.

1. Column 1 is the Major keys. Rows contain the major scales.
2.Column 5 contains the next key in the Circle...hence the name Circle of Fifths
3. Column 6 shows the Relative Minor Keys
4. For key signatures...just count the number of sharps or flats in each row, Do not count the ones in column 8 as they are the same as column 1
5. The first five Keys are called the"Five Easy Keys" as these are the easiest keys to play in and transpose and such. You'll find that most popular songs are written in one of these Keys.