If it makes you feel any better I don't really believe in hard mode. I'm not saying that people haven't cured themselves by doing it but all the stories I've heard took a year or more to heal and I honestly think they would have healed either way, as long as they avoided porn and masturbation. It you train your mind to abstain you will end up abstaining for the rest of your life, it is a great thing when it comes to overcoming porn addiction but not so great when it comes to sex, for brain abstinence is abstinence, be it from pmo or sex. So the best advice I can give you is have sex with your girlfriend and get your brain used to it. Of course take it slowly, maybe once every two weeks, then once in 10 days, then once a week etc. Get your body accustomed to orgasming from sex and slowly decrease time between orgasms as it gets more and more used to it. I have seen progress by doing this as have many others, just be prepared that it will take a year or more before you can have sex every day without problems, it's a slow progress but it is progress. And of course stay away from porn and masturbation as you already know. As long as you do things can't get worse, they can only stay the same or improve, that's my mantra.
Also don't blame porn for everything, depression and anxiety can fuck you up just as much, seen it with my own eyes, so try to work on that as well. And try to raise dopamine as much as you can by getting enough sleep, avoiding coffee and energy drinks, avoiding alcohol and eating healthy. I know these thing are always thrown out there whenever you read about rebooting but they do help, even if not obvious immediately.
And finally, DON'T COMPARE YOURSELF TO OTHER PEOPLE, COMPARE YOURSELF TO YOU FROM ONE YEAR AGO. That is the only way to know if you are progressing or not. When I compare myself with me from one year ago it's like night and day, even though I'm not fully cured, I would lie if I said that the progress is not clearly visible. I'm sure that if you compare yourself with you from one year ago, you will see improvements as well, even if they are minor, as long as they are there you are going forward and you will get there.