New to power production & storage

Hi All.

I'm new to all this and thought I'd ask questions before I buy. (Better safe than sorry)

I'm looking at possibly installing a Huawei Luna system.

My reasons for doing this is to reduce my house expenditure on electricity and to be more environmentally friendly.

I live in a 4 bedroomed house (2 story) with an unobstructed SSW facing pitched roof. (in Suffolk UK)

There's currently just 2 of us living here and my smart meter indicates that I use 12 - 14 KWh daily.

I think I should easily be able to fit 12 panels on the roof.

I'm thinking that I should get two battery panels + controller/inverter.

With this in mind, I'm hopeful that in the sunny months, I would be drawing almost nothing from the grid and in the winter months, I should only need to draw from a night time tariff.

My questions:

Are my thoughts so far, realistic?

Are the controls (App) for this system very comprehensive and flexible? (I am a technical person)

Will this system allow me to export excess power to the grid (possibly for profit/credit)?

Who/What is the better supplier/tariff for my needs?

Am I likely to have spare power for charging an EV (in the future)?

I'm aware this system will have the ability to supply power during a power cut.

Is there anything else I should be aware of, or are there features I may not have heard of yet?

Thank you in advance