if you want a simple graph such as an x/y graph where you put a point, draw a line between it and the next points etc. That shouldnt be so hard, in fact coding it should be a peice of cake.
If you've been trying a month you most likely have some code even if it doesnt work. Perhaps we can help you fix that.
If you want barcharts, thats fairly easy too
Only ones that are more complicated are those where you have to do an approximate line through it, with best fit or curves..