Lightning network for barber shop

Hey guys, i just recently got into the bitcoin world so sorry if my question is stupid. I own a barber shop and decided i want to try accepting bitcoin for my services. I got recommended to accept it via lightning network so i installed a phoenix wallet to try it out with a friend of mine. When he sends me something, there is a channel created with a fee. My question is - if a customer comes to my barber shop, does it always open a new channel or use already opened channel by another customer? If not, will there always be the fee of 3000 sats? Because that means i will be losing a lot of money on fees. I heard about running a full node, but does it solve my problem? Thanks for any help