- just take an item out and put it back in. if it turns on then you've mastered that item.
- also, download the motherboard diagram. you'll know what the names of the parts are and with google know what it's used for.
- there are also some precautions like turning off the power on the back of the pc, not shocking the components, not sticking a magnet in the pc, etc
- if you're not sure how to remove apart then just take a pic of it and up it here.