Link in text and file downloads

Hi all, sorry ive a couple of questions here. new to building the sites.

I would like to link documents into my Blocs site that download when people click on them, someone said dropbox would be good, but i may have quite a few. i have server space, but am not sure how i link from blocs to a file in a document store on the server? any thoughts

also, i would like to create a link from some text in a paragragh such as ‘contact us’ which goes to a page, when i click on ‘link’ in the bloc it changes the font and size of the words and i cannot change it back, how do you create a link from text in a paragraph without it doing that?