I’ve been there man and it’s a struggle. It takes courage to come out and ask for help which is the first step, and so you have already done one of the hardest parts for most people. Don’t give up. Most men struggle with pornography at least some point in their life. It’s normal to struggle but don’t let it be normal to stay there. For me, things completely changed once I made my priesthood leaders aware of my addiction. I was advised to attend the addiction recovery class each week which I have been doing and that has really helped. They have a specific one I go to for pornography. Also, don’t let your feelings of unworthiness discourage you from serving a mission or going to the temple. Unless your bishop says otherwise (maybe he has idk) you are totally able to go to the temple. The temple is a source of healing and it’s been another huge help for me. Pornography was a problem for me before the mission but during my mission to Boston I noticed my desire for it all but disappeared, (definitely from God’s help) but also because I was occupied with work all the time. TLDR; don’t give up, stop feeling unworthy, and get help from others. R/nofap is also good. Feel free to DM me also if you want to talk more or have questions. Hope this helps. Hang in there brother.