Your mind is powerful, you are the "placebo" so if you've read all of the articles and information on no fap and you believe it can be beneficial in it'll probably have some benefits.
But I don't think you need to not masturbate to be more confident, have more energy, be more assertive/aggressive, I think you can get a lot of the same results with tantra without any of the repression and stigma. Having more blood/energy flow in your neithers can be done by holding back, creating build up but you can do that with tantra. If you're desensitized, learning how to control your breath and actually be present in the experience can bring that back and while there's nothing wrong with a visual aid, watching porn, or anything 2 dimensional on a screen can pull you into a 2 dimensional experience, it can dull you you put more attention on what you're watching than what you have on yourself yourself. If you can reach orgasm, or even have of an orgasmic state of mind (rather than 'aggressive') as a baseline without having to ejaculate, it can help you with your confidence, energy levels, magnetism ect.
this thread got me rollin how the fukk is this possible, then you got dudes keepin tabs on days on some alcoholics anonymous shyt
You can do this, bro
