Newer than I'd Like

Hey reader,
I'm a 24 year old male who's been using porn for nearly half of my life. I've researched the negatives, I've tried reading various books, I've used the site blockers, but i haven't tried holding myself (in some shape or form) accountable to other people or even a community. I figure this may be the next best step into really trying to end my addiction to PMO.
I've got lots of reasons (atleast sorted out in my head) to want to quit PMO, but i think I'm failing in really being able to "will" myself to change as far as that translates into what i actually do. Hence my reason for wanting to join this community. Hopefully this thread thing will help, even if its just me opening this up into a space where i can be encourged to move in the right direction which might initiate some change. And even if it sits out here unread, maybe that'll still be something.
I think the longest as of late that I've been able to go without MO has been about 3 days, which has been a struggle to try and achieve again. So maybe that'll be my first reboot goal? I wonder if trying to reach too high might just set unrealistic expectations and set me up a bigger failure. Or kill any momentum I'm hoping to grow. I've already relapsed today (early in the morning) so in terms of a "day" counter i guess I'll have to try tomorrow. I think my parameters would be cutting off PMO, but after the 3 days i wonder where that leaves me. I've got a girlfriend, and I'm sure she'd be willing to help me in abstaining but i think for now I'd like to try it without sacrificing that aspect of our relationship. To be honest though, i have no clue how wise of a decision that really is.
Anyway,
I don't think I'm very different from many of the stories on here and so thanks for possibly reading the same struggle over and over again reader.