Change the font of the posts

Hi to all..
I have some question about the setting of the blog..

1 -
Can I set the font and the color of the words of my blog link >>
https://sospersonalcomputer.it/blog/il-segreto-per-migliorare-la-tua-quotidianita-al-computer-il-multimonitor-ti-ho-avvisato.html
like this page?
https://www.dariovignali.net/guadagnare-con-un-blog/

2 -
Can I reduce the width of the blog page?
Similar to the link before?

3 -
Can I insert a different colored background to the pages of the blog?

Thanks
Simone