Paypal button not displaying properly

I know there have been previous posts on this topic, yet I’m still struggling and would be most grateful for any help.

I have a basic WordPress blog – not the sort you can use plug-ins on, yet I believe I should still be able to install the Paypal shopping cart button and functions properly.

I’ve had no issues following the initial procedure through Paypal, Merchant and then detailing features of a button – I cut and paste the code this creates into my page at HTML (as Paypal directs you to), yet when I save and view the page the text is there but the actual button won’t display ??

On this help page (item 6) https://en.support.wordpress.com/paypal/
it suggests and shows you can flit between two options in Paypal – ’email’ or ‘website’ but in the version of Paypal currently in use the screen doesn’t display the options like this, there is only the option to copy the code – not sure if this is to do with my lack of success – it’s driving me nuts!

Thanks for your time, lemonworlgirl ??