I’m 16 Years Old Very Healthy Lifestyle But I Have Serious Problems Getting Hard and Staying Hard

I have recently come out of an unhappy relationship and have found someone new, we’ve started to take things to the bedroom, but I have serious problems getting hard and staying hard in front of her. Is this normal when you start trying things with other people? I didn’t experience this with my previous girlfriend. I’m 16 years old and have a very healthy lifestyle, I go to the gym 3-4 times a week and have a decent diet. I watched porn from the age of 13 and have now realised how much this has affected me. I’ve quit porn and masturbation, I just wondered how long will it be before I start getting my natural strong erevtions again? This is causing me to be very depressed recently and family members have been noticing, Any help or advice to stop me worrying would be much appreciated, Thankyou.