These are the different parts of a skateboard: trucks, deck, wheels,griptape, hardware, bearings,risers(optional).
How to do a :Kickflip. Put one foot on the tail and the other foot on the bolts. Kick down on the tail while sliding your other foot up diagonally. If you did it right the board should flip once and then land.
Olie: Put one foot on the tail and the other foot on the bolts. Stomp on the tail and slide your other foot straight up. If you did it right it will rise of the ground.
Shoveit: Olie but instead of keeping your feet straight you move your left foot back and your right foot forward. The board should spin counter clockwise.
Heelflip: To do a heelflip you just flip the board the the opposite direction as the kick flip.
Backside boardslide: Olie, do a 180 onto a rail or curb and slide down. When you reach the end of the rail jump of and do a 180 back into your riding stance.
If you are a beginner you should get a light board with slow bearinds. If you are advanced get the opposite.