A good place to start is by looking up Andy’s Spotify and Apple Music sites, or his Bandcamp where you can listen and download.
If you go to the albums page you’ll find links where you can listen to each album on either Spotify or Bandcamp.
There is a A Young Person’s Guide to Andy White on his Soundcloud page, where you can find rarities you won’t find anywhere else.
Let us know if there’s anything in particular you are looking for!