Absolute begginer needs help

Hi.

I’ve just sorted my hosting and got a WP.org site space ready to go, but I have no idea how to make my site.

I need three pages: a main title page which I’ll fill with copy & images, a BUY page with a paypal checkout, and a THANK YOU page where I’ll credit those who helped me along the way.

Is there a starter’s guide anywhere on here? I really am clueless.

Thanks.