This is a perfect first welding project because you can make lots of mistakes and it will still come out fine.
Step 1: Find some scrap nuts and bults
note: do not use galvanized nuts and bolts because they give off poisonous fumes when you weld them.
all the parts you need are shown below:
Step 2: Make the fingers and thumb
The photos show the fingers already attached to the hand, but that's just because i forgot to take a photo before I attached them. At the end of this step you just have 5 loose fingers.
The carriage bolts are nice because you can choose the curve of the finger joint more easily and they look a little better. You can still choose your finger curve with a normal bolt but it is not quite as nice looking.