How to make my own program??

Answer 1

You started a C++ course, so you are on a right way to success :)
Try experimenting with "Try it yourself" part of the course and save it in a code playground.

Answer 2

just like @Kuba said , practice :)

Answer 3

Revise your concepts and use them to make a code.
You can refer if you aren't sure like how I make my basic web codes

Answer 4

Learn and practice.
Everything you make here will be a program :)

Answer 5

Learn C++ First