Should I do this on a separate pc or on the same one that i have my original wallet ? If i do it on my original pc, is there any danger to mess up my coins?
No. There is no risk of you losing your coins or whatsoever. Just restore your wallet, disable 2FA, and and preferably send your coins to another wallet (a normal wallet or just create a new 2FA where you know that you have access to the 2FA code); Don't forget to save your seed to save you from situations like this.