Upgrading from D3300 to Z 30?

Right now I have the D3300 which I use almost always with the lens AF-S NIKKOR 50mm f/1.8G.

I was thinking of upgrading, I was looking at buying the Z 30 and then buy either the NIKKOR Z 50mm f/1.8 S, or the cheaper NIKKOR Z 40mm f/2.

My question is, is it worth it?
Will I see a noticeable improvement of photo quality between the two setups, or is it not worth the additional money and I should wait to invest in something better?

I'm attracted to the Z 30 because I'd like a small and light camera to go hiking, but are the photos going to be better compared to my D3300 ?

I will use the camera only for photos. I know the V30 is marketed for vloggers, so I'm afraid I'd be paying for features I'm not going to use.
I think I'm ok with the lack of EVF, I'm not sure I'd be using it at all if a new mirrorless camera has a good screen, unlike in my D3300 where I always use the optical viewfinder.

Any advice much appreciated, thanks!

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