In Classical Games...(OTB)

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BeepBeepImA747
How fast should I move in the opening? Will it hurt me to blitz out developing moves without calculating? Can I instantly play e5 to e4? I have never played OTB. Since I don't use theory, is it a good idea to try and calculate my opening moves?
BeepBeepImA747
So when do I know to start calculating?
Ofgeniuskind_closed
If you have never played OTB it is confusing when you are not used to the pieces, but instead 2D ones. I would recommend setting the pieces to 3D on here for this reason.