The first thing u need to do is download a music program.

I got some lined up for u:

Frooty Loops

Cool Edit Pro

Q-base

Now you need to discover them programs before you can begin
After that u need to have a good basic (Drum and Base)
With that you need some good ritme feeling(if u havent got that u can forget it )
Then you need to ad some really coowl sounds(hi-hats or handclaps)
If you got that right,you need to add some vibe by adding synt-sound(synthesizer)
Just do what your mind thinks of,nothing is wrong.
Just make it sound coowl and u will get some coowl beats.

Now go and good luck with making beats