My struggles with nofap (restlessness, mood swings, brain fog) How can I fix these things?

I've been addicted to porn since I was 10. I'm now 24 and still trying to quit. These are the current problems I face every time I attempt nofap.

I feel absolutely restless, even though I try to calm myself down temporarily by doing push-ups and taking cold showers. I still struggle to maintain a calm and focused mindset when studying or working, which often results in a relapse just so I can get some work done. I know people say you're always going to have to control your urges but if it's to the point I can't be productive. Is it really worth it?

I also get horrible sleep quality and have constant nightmares and mood swings when I'm past the 2 week mark. Is this temporary, or just something you live with on nofap? My biggest fear is that these feelings will never end no matter how long I go.

This is less of a worry but I frequently experience blueballs, even though I avoid touching myself, and find it challenging to control my sexual thoughts (usually thoughts of porn and not sex). Even when I try things like meditating, I can't help but have sexual thoughts.

Worst of all, every time I relapse, I get even more addicted. I go down a spiral of the most unwanted and degenerate fetishes which really makes me scared to try nofap over and over again. If I ever do relapse, is it safer to do it with just vanilla/soft-core porn?

What can I do about these things? Advice and tips would be really appreciated.