hope you are doing absolutely fine
YES DEFINITELY you can.
PHD is a doctoral degree.It is of 3 years in duration but you can complete in a maximum span of 5 years. You can a select your desired topic or subject to do an in depth study.The minimum eligibility of PhD course is a masters degree in any branch from a recognized college/ university.
There are many options for you after MA in PhD -
LITERATURE, et cetera
ALL THE BEST
hope it helps