Looks like you got the shape, but it seems you may have applied a subdivision surface where you didn't need to. Did you apply a solidify modifier yet? I can't tell from this image. If you have the ability, can you somehow send me your .blend file? If not, don't worry. Here's what we can do. I will create the dome for you and send you my .blend file. You can study it and try to recreate it again, or feel free just to use my dome for your project.

I know it's difficult to follow tutorials sometimes, especially when you have to stop and start again over the course of some days. So let me just send you my .blend file of the dome. I will even UV unwrap it for you if you want. This way you can study the object and maybe get a better grasp on it, but you can also use it in your project. I don't care if it's a commercial project. Consider it a freebie.

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