English has two 'present' tenses. The simple present is used mostly to talk about things that are always true, and things that happen repeatedly:
Cats catch mice.
My father works in an office.
I go to school every day.
I walk to work every Tuesday.
We use the present continuous / present progressive to talk about things that are happening as we speak:
The children are playing in the park.
I’m studying hard for my exams.
NOTE: We can also use the present continuous to talk about the future.
I’m playing squash tomorrow.
He’s catching the train at 6pm.
I'm walking to work next Friday.