Hi, please excuse me for any mistakes that i make or how stupid i may sound, i find arduino a struggle.
My question is, i want to be able to turn on a LED wireless.... is there any way that i can buy a wireless doorbell, connect the receiver to the arduino board, and use the button to turn it on for a certain time.
Yes, it's possible, but you'll have to hack the receiver a little to get a wire that will give you a signal. How to do that and how to condition the signal so that it's appropriate for the arduino to use will of course depend on the specific doorbell hardware you get.
You can also use RF modules (TX & RX pair) instead of wireless door bell, they are not expensive, but you need to use encoder and decoder as well like HT12E and HT12D. Hope this helps.