I’d like to know how to convert a shape like this one in a solid one.
I tried with outer shell with no result.
Does anyone know the correct way to do something like this?
I think I did more steps than it was necessary.
Your modeling method is poor and you are creating the internal faces that prevent it being solid.
Delete those unneeded faces as you go and instead of healing faces by drawing across the holes, trace an edge segment. Or better, just erase the the edge of the hole.
I also tried deleting them as I go but I think I’m doing wrong.
For example, for the first step (I think it can be applied for the rest of the model) I tried it like this with no success:
I thought about that possibility too and I was almost sure it would work, but then I thought “I want to feel free to start the drawing from the point I feel like.”
After watching how you did, I have no doubt about the steps you followed are the right ones, I’m a person who likes to know alternative ways to do the same thing, for example the last method you showed, so I really appreciate that