I might have to quit because I have to go through a block but also not fall out of the level
because I can only think of a lowing simulator
Up to you of course. Your time is your time. That being said getting through these issues is what leads to great growth as a developer.
I can't quite tell from your message but it sounds like you are dealing with a collider issue. You want to move through a block but also not have the character fall through a level. Colliders are used is almost every game but they are a difficult thing to master.
The first thing that comes to mind is to check what Layers each item is on. Here is a small page from Unity that explains Layer based collision detection. Let me know if it helps or if I can help in any other way https://docs.unity3d.com/Manual/LayerBasedCollision.html