u/Internal_Stomach_801

I have my own domain, let's say (myname.com).
I want to receive and anwser using a email with my domain (contact@myname.com). But also want to create temporary e-mails when needed (forinterviews@myname.com, governamentalRegisters@myname.com etc. Can I create as much as I want? Can I choose the names of my emails? How many e-mails I can have on this plan? Just reforcing I want to receive in created email and answer using then. I don't want to answer using my private gmail and show my gmail.