Add Paypal to website

[hudsongc]

Our garden club has a pivotx website and would like to be able to use paypal for people to buy our garden tour tickets. I know how to add entries and pages and a link to a website, but paypal talks about html and I don't know that. I just want to add a button that will link to paypal. Can anyone give me some guidance?
Thanks
Sue L'Hommedieu
http://www.hudsongardenclub.org