Although you can donate with paypal if you wish to,
unless it's for a commission payment or something of the like
I suggest simply buying something from bandcamp or subscribing to my patreon.
Subscribing to my patreon will give you early access to whatever I make
(aside from commissioned works), as well as things that may be unreleased.
Each payment is greatly appreciated and helps with not only potentially
increasing work quality, but also helps keep what I do worth doing.