adaaba, I'd recommend proofreading your comments before trying this. (Your question could have been written better, as well as giving more details on exactly what you'd like to know), but I've done it with a writer I admired. I friended him on Facebook. I read his blog whenever he has a new post. I comment on both, if I have a comment to give, and I've even helped him with his writing. (I found out one of his short stories was in a literary journal, so I bought that issue, read his short story, and found a chronological-order problem that didn't get caught before he published. I then messaged him to ask him what I should do, if I find a problem with the story line after publication, without telling him I was asking about him. He told me I should notify the author, so I did. It ends up, I saved him some embarrassment, because he wants to include that in an anthology he's writing for his short stories. lol)
Basically, friend wherever you can find him/her and then treat the person like what he is - a human being. Don't contact an author to friend him/her simply to treat him like he's some kind of god. To make friends, be a friend. BUT, particularly because they are authors, make sure your writing is proofed before sending. It's doubly embarrassing to send typos/poor writing to an author.