Own path with A*pathfinding project

How can i make my own pathfinding (waypoint) with ‘‘start’’ and ‘‘end’’ ?

I’m not quite sure what you mean?
Have you read the get started tutorial: https://arongranberg.com/astar/docs/getstarted.php
or watched the get started video: https://www.youtube.com/watch?v=OpgUcYzRpwM?