Welcome to the addiction
Once you start it is very hard to stop!
Why don't you try some thing simple like cutting the bottom off the leg and sewing it into a small bag to start with? You basically just need to sew a seam at the end you cut and then you can attach a button and loop closure to the section that was the hem of the jeans. A bit of ribbon or braid (or even an old scarf can be attached to make the handle. You can then decorate it with embroidery,applique, glue paint etc. and you have a nice little bag to carry things around in. You can alter the top part to make a skirt too!
Did that make sense? It is pretty late here and I may be blethering
A good cheap resource for sewing equipment is op-shops (like the salvation shops of St Vinnies). Also mention it to people you know and you will be surprised who will happily pass on their unwanted stash and UFOs. Church and yard sales often offer up treasures (I got 2 enormous bags of upholstery fabric once for 20cents! and picked up a working sewing machine for $20!!!). The clothes and linen other people throw out also gives up some marvelous treasures and even damaged clothing often will still have zips and buttons and braid or lace attached that you can re-use.
The main thing is to have fun.