I also learned (years ago now) by using the MIT Guide, so +1 for that. If you don't want to spend any money on picks and a tension wrench, street sweeper brist

I also learned (years ago now) by using the MIT Guide, so +1 for that. If you don't want to spend any money on picks and a tension wrench, street sweeper bristles make great stock for creating your own tools. A grinding wheel will save you hours with a file, if you opt for this approach. Those bristles are tough!