To talk about future plans with specific times and/or places (future arrangements), we use
Present continuous (i.e. I'm meeting my friends tomorrow at 7 pm)
We use "be going to" for...
(I'm going to visit my mother next weekend/Based on the weather forecast, It's going to rain tonight)
Future plans/predictions
Mention the object pronouns:
I ---
You ---
He ---
She ---
It ---
We ---
They ---
I --- me
You --- you
He --- him
She --- her
It --- it
We --- us
They --- them