Doesn't the other end also have to have WhatsApp?
ie. WhatsApp can't send real SMS, it can only send messages to other WhatsApp users, (same as Viber which I use).
As for whether you're able to see whether the other end has received/read an SMS, that's a function of your mobile provider and your SMS app.
AFAIK, there's no app that can send a real SMS and also indicate whether a recipient has read it _unless_ both sender and recipient have read receipts enabled.
Signal can send/receive SMS but it still needs read receipts to be enabled to indicate when one is read.