how to do top down collision

how do I make it so my character cant walk through walls and will stop instead?

have a look here: https://microstudio.io/FunnyJeans130/coingrab/

The easiest collision detection is AABB.

Detects the overlap of two rectangles aligned parallel to the coordinate axes.

https://microstudio.dev/i/gilles/platformerbasics/

https://microstudio.io/KimsGames/collisionexample/

https://microstudio.dev/i/HomineLudens/aabb/

https://microstudio.dev/i/PaulSt/collisiondetection/

https://microstudio.dev/i/Loginus/collision/

https://microstudio.dev/i/Loginus/mapcollision/

https://microstudio.dev/i/microstudio/collisions/

https://microstudio.dev/i/gilles/quickengine/