To create a basic camera system (one without zoom), you need to make multiple variables: two for the camera, two for the player, and two for every sprite you want to include. The variables for the camera, we will call them "camera x" and "camera y". The player variables will be called "player x" and "player y".
Now, to make the camera follow the player, we first need to make the player able to move. First, we will make it so the player goes to player x and player y. All we need are go to blocks and the player position variables. Any of these scripts can be used.
or
(if you want a cleaner-looking script, I advise you to use the second one)
The only thing is that we haven't made the player able to move yet. All we need to do is create a movement system that changes that variables, since the player is constantly going where they say to go.
By using this basic script, the sprite should be able to move. If you are wondering why there is a wait block, it is because it prevents the sprite from moving insanely fast.
You probably noticed that there is no camera effect yet. That is because we haven't set the camera variables, and we also need to update the first script in the sprite:
Now all we need to do it to make the camera follow the player. When the camera follows the player, the player is usually in the middle of the screen, which means the camera is in the same position as the player. Using this logic, all we have to do is set the camera position to the player's position.
Now you are probably thinking to yourself, But now the sprite is just staying in the middle of the screen. That is because, since there is only one sprite, the camera effect can't be seen. To make the effect visible, we have to create another sprite. We will also make new variables, called "npc x" and "npc y". The NPC is going to use a very similar script to the player:

Now, when you run the project, the camera effect is very much visible.
That is the end of the tutorial! Like and subscribe or something, idk.
Oh yeah, you should probably include a setup script or something, like this:
(yay i am reviving the tutorials section)
(don't criticize the simplicity of the camera system)