A good start!
The big 3 or 4 (DSOTM, WYWH, Animals, The Wall) are where most people begin their Floyd journey.
After you have those under your belt , the next thing to do is work your way backward. I reccommend Meddle and Obscured by Clouds next, which are two of their more accessible early albums.
On Meddle, pay close attention to Echoes and Fearless.
On Obscured... pay close attention to Childhood's End and Wot's... Uh The Deal?
Also, Careful with that Axe, Eugene is a masterpiece that can be found on Relics.
Happy Listening!