Only some, we use the ones like „umm“ if we are confused. We also use „hmm“ to tell the reader we are thinking.

Borh

As an English speaker, I don't use Meh, Phew or Oops so much - but that is a personal thing, I have heard others do so. The other words I would probably speak often enough during the day. Not really while writing (or texting) however.

Hi Neymar I would like to talk to you and have a new friend, I am mexican

Both