How to repair a hole in your jeans - or anything.

Cut patch.
Smooth it so it lies right, then pin it.
Sew around it while hanging out with friends or family.  (Big needles are less fiddly to use.)  You can patch on the inside or outside.  If you loop the needle through each loop as you go round, it will make a nice pattern.  When you are done sewing round, "heal" the hole by sewing it down until the edges will no longer fray.

Also - when you start using a needle (you can keep a few big needles and some thread around - don't be fussy or it's no fun) you can use your skill for many things.