Aizaz Imtiaz Awan
1- Sorry to say but we didn’t seem to understand your concern. Could you please elaborate your concern more about what exactly you mean by confused in terms of the Login/Register Text on the My Account page?
2- That warning notice on the Checkout page is arising because you haven’t set up any Payment method on your Site through which one can Checkout on the Site. So, you need to go to Dashboard > WooCommerce > Settings > click on Payments tab there > in that define the Payment method that you want to enable on your Site and then the warning will wipe out: https://snipboard.io/UKmnpW.jpg