In my opinion, crafting is one of the hardest, most difficult skills because of everything you have to do to make stuff. But if you get a high enough level, then it really pays off! Now here is the section:
Leather
Leather is the easiest thing to do and is the first thing you CAN do. But it can get expensive.
How to make leather:
1. Kill a cow and take the cowhide
2. Go to a tanner and pay 1gp for each cowhide you want to turn into leather
3. Get a needle and thread from a crafting shop (theres one in Al Kharid)
4. Each piece of thread can make 5 things, so get as much as you need. The needle can be used unlimited times.