im trying to make a game thats in 3d and is in a third person kind of view like this https://i.ytimg.com/vi/eRlNoUn5zVg/maxresdefault.jpg
but their isnt any tutorials on how to make this effect.i would love it if someone would help!

I recommend using a raycaster. Take a look at this Wiki article:

https://en.scratch-wiki.info/wiki/Raycaster

There are also lots of other raycasting tutorials that you can search up.