Musicians either hate them or worship them. They can be just a block of wood and a bunch of wires if you don’t take care.
I must warn you. To set up your Tele yourself (You should!) you need to be a bit of a guitar technician. Learn, ok. Also be stubborn and stay with it. You may adjust things many times. Get tech help from your service people where you bought the guitar if you bought it new. Or just go to a Fender dealer’s tech. Have them look it over and give you advice and reccomendations.
I have never really had a guitar tech set up a guitar exactly how I need it on the first try. Not even myself. :o)