Starting 90 days, Will these supplements help..?

Hello one and all,

I have quit porn or masturbating looking at images on my phone for exactly
one month now, and feel really great about it!
I'm 50 years old btw, don't drink alcohol, don't smoke or do drugs, and am extremely fit for my age.

While I've masturbated to orgasm in that time, it's been without looking at any images whatsoever, and there's a big difference as I feel no shame

Tomorrow (Mon 26th July), I'm beginning the full 90 day NoFap Hard mode.

Bit of info about me:
I've always suffered with performance anxieties in the beginning of a relationship, but after a while that goes away once full sex is done for the first time, as it feels like a big psychological hurdle, but I hardly ever manage it in the beginnings due to nerves!
But I've been single 6 years now and want to meet someone and it's making me anxious about going through that, but I want to end my lonliness more.

I don't have E.D or P.I.E.D and on the whole when in a relationship do not lose an erection during sex, or oral sex.
It's just in the beginnings of a new relationship sometimes I cannot get fully hard, due to the anxiety of it. Once I've orgasmed through penetrative sex though into the relationship, my confidence generally takes over.

I have 2 questions please!
1. Will completing the 90 day NoFap actually give me a harder erection on the whole after 90 days if I keep the same habits?
Obviously I want to avoid masturbating to 'test it out', but do guys wake up with harder wood etc? Has that happened to anyone during the NoFap process?

2. I have done some research on Nitric Oxide too, and will be taking the following suppliments daily during the NoFap 90 day challenge:
Zinc 50mg
L'Argenine 2.5g
L'Citrulline 3g
Panax Ginseng 3g
French Maritime Pine Bark Extract 4g (aka Pycnogenol)
Will the above make me harder as well at the end of the 90 days?
Anyone have any experience to share?

Many thanks to all who reply!
Kind regards,
Lee