How implement PathFinding

I am making a game where i have a map of points. There is a origin point, and when the player clicks other point a route is created. The thing that i want to do is to implement the pathfinding system to find the shortest route. The distance between the point is calculated by vectors.

I have seen tutorials but i dont know how implement it. Can anyone help me?

use unity navigation system .

I think this will help you: Civilization/Dungeon Tile Movement & Pathfinding #1 - YouTube
Just play to implement it. Nothing can go wrong if you make backups and you learn by doing so just play around.