I need help on several things please.

Hi,
I asked these questions following another open thread and you still haven’t answered me (I think that’s strange) so I open this new thread.
I need help on several things please.

LOGO HEADER STICKY
I need the logo to hide when scrolling down (I think they call it stiky) and only the fixed menu bar remains
when the scrol is done on the pages.

MENU IN THE MOBILE
Also do it in the mobile version, now everything is hidden and to see the menu burger you have to climb to the top again.
The logo does not appear in the mobile version. How can I make it to be at the top of the menu?

SLIDER IN THE MOBILE
I need to make the slider image of the mobile higher, now it appears narrow.

FOOTER BACKGROUND
I don’t know how to change the bottom of the footer (I need to put a background color or image) how is it done?

ABOUT THE STORE AND VIRTUAL PRODUCTS
The theme has a store, and I have seen that it has the page ‘my account’
In principle the store will be of virtual products but I need that when they are purchased they are not downloaded, if they appear and can be viewed and executed from the user’s ‘my account’ area.
In other words, I need that when the user buys a virtual article, it is downloaded to their account and can see it whenever they want, but that the file cannot be downloaded, unless they access that file by entering their account on the web.

I hope to explain well what I need. I have already seen several websites that have this method, and I need to apply it.
It is a way to protect the downloadable content and at the same time that the user can enjoy them whenever they want (traffic is also created on the web)

I need that every time a product is sold there is a way to issue the invoice and its numbering

Can the theme do this? if it doesn’t, can you please recommend a plugin that can do it?

They are a few things … I await your response.

Thank you very much in advance!

Ana