REDSTONE ?!
Redstone can be the most complicated things ever and even I don't understand it all but ill give you the basics of Redstone physics.
No.1
Redstone repeaters can be very helpful. they can make the power run thou the Redstone for 16 blocks longer. The Redstone repeaters can make the thing your activating take a longer time or a shorter time. Place one leaver on the ground and turn it on. Then place 14 Redstone on the ground in a line pointing to the leaver. After that place one Redstone repeater on the other side of the Redstone line you made. The lights should turn on in the Redstone repeater if not turn Redstone repeater around. place 14 Redstone on the other side of the Redstone and that Redstone should light up. I am very sorry if this dose not help or if its confusing but it should work good. If you right on the Redstone repeater than the light should move and that will mean that the Redstone will
No.2
Redstone blocks work the same as Redstone touch's but when you switch a piston on it can push the Redstone block two wards another piston an turn that piston on. Sorry if this is confusing for you but i am not very good at explaining I guess that's why i suck at writing books. Redstone also looks good as a decoration.
Well those are the most important redstone bits you need to know about the rest should be easy enough to understand but if not then sorry