Use of present indefinite in various situations:

Based on eternal truths

like ; The sun rises in the east.

birds fly.

The earth revolves around the sun.

Based on day to day activities

I get up early in the morning.

I go to office every day.

I read daily.

When doing comentatory on radio and TV, only present indefinte tense is used.

Dhoni takes a wicket and wins the match.

Yuvraj sing makes history by takes six sixes in an over.

The headlines of newspapers are also in present simple tense.

Covid 3rd wave starts.

Chandrayan 3 launches from shriharikota space centre.

Future action

Our college opens in the month of july.

He reaches here tomorrow.

Used with whenever and when.

Whenever it rains, the mohammadpur drows.

whenever he cames, he stays here for a day.

When he cames here, he brings fruits.