Accepting Bitcoin via LN at my barbershop

I have been accepting Bitcoin at my barbershop since 2014 thru BitPay. Over the past year I’ve been hearing about the Lightning Network and built my raspi. I installed umbrel on it and have done some LN transactions but I’m looking for something as seamless as scanning a venmo code and hitting “pay now.” I dove into Btcpay server, but I am still looking for the easiest way to do this. Ideally I just want to have a Ipad on the front desk where the generated invoice for that service would pop up and they pay. Does anyone have any recommendations?