I used to masturbate 3 times a day and surf the internet 12 hours a day. I quit all together now and limit computer for 2 hours a day. I experience now anxiety and anger off compueer. Cocaine/ice /ecstasies was much easier addiction for ore to stop then internet
I'm also addicted to it and i don't feel good if i stop it for some days. Like i don't find things to be interesting anymore outside of it and when i see people out there living their life and having fun i feel really bad because i feel like i'm wasting my life. Internet is filled with bullshit, everywhere... ads, random weird pics popping up out of nowhere, fake news, toxic people and it is slowly gonna fuck up your brain. Anyway congrats on day 13 of nofap, my advice would be to stick to nofap for now until you feel enough confident to minimize your time spent on it. Or go step by step, i feel like from 12 to 2 hours a day would put too much pressure on yourself and make it all worst. I tried avoiding it completely for some days but it's not that easy as i said before.
