OP's problem is not whether his addresses are segwit or legacy. His problem is that he is importing invalid private keys or he's exported them from Armory in a format that Electrum does not accept. This is why the Next button is not clickable.
@OP, when you exported the private keys, did you check the "Private Key (Plain Base58)" box? Do the private keys start with "L" or "K"?
I was very clear with that I used Saffello which used Segwit before, but now Taproot (have no clue of the difference), is this the source of my problem - hence I'm f*cked?