Wordpress website help

I need help with my Wordpress website.

I need the website to look the same on desktop, mobile and tablet as currently on mobile there are large gaps before the text.

I need the blog to be looked at as some of the links to the blog don't seem to be working properly (they used to) and set this up so that 'adding' a new post will mean that the link auto-generates.

Make it so that people can navigate from the Blog back to the main page.

Thanks