I keep sinning and can’t stop

I don’t want to quit for the right reasons. A lot of us which includes me count “failings” as giving into something specific like gooning or watching it. I have lust in my head. I allowed it into my brain. It’s like I don’t care about the main purpose of quitting which at the end of the day is it’s sin against God. Christ died for all sin so sin is pretty serious and if ur a regenerate Christian who has been born again u should have the desire to not sin against God and for me. I feel as if i want to quit porn and masturbation for myself and not for Jesus. It’s very selfish and I just am a selfish person and idk how to overcome this. At first it was for God and when I was in the midst of giving in everyday it was for God and I felt hopeless. I am tempted as I type this and have been all morning and while I didn’t give into PMO and I won’t. I still gave into lust inside my brain. I just don’t know what to do when it comes to following Christ. It’s feeling like I’m trying to do all these good works and stuff for the wrong reason. Good works mean nothing at all considering 2 things. 1. If ur not truly saved- what did Jesus say about the Pharisees? They are clean on the outside of the cup (works) but their inside (heart) is dirty. Or 2 we don’t do good works to inherit salvation or to get on Gods good side like more attention or more grace. It’s rather we should be doing good works as a result of what Christ has done for us and an after effect of salvation good works should come as a result of the drastic change in ur life.