@luismtzzz,
Hi, Luis, sorry I didn't say welcome before. We may have even talked.
Setting up your profile will help you - and if you have questions on all that, we can answer. Most of the rest of us had some trouble learning all this too.
In the meantime, quoting is easy, just enable ...
To access your profile and preferences, look at the bottom of the page, all that stuff on the dark blue band.