Here are a few ideas to get you started:
www.freejazzlessons.com/jazz-standards-you-should-learn-part-1/
www.freejazzlessons.com/jazz-standards-you-should-learn-part-2/
The Jamey Aebersold series of tutor books with CDs are THE definitive way of learning about jazz, harmony, improvising, styles, etc.
sendmemusic.com/jazz.html?cat=56
sendmemusic.com/jazz.html?cat=56&instrument=16
Now relax a bit, with some of my favourite music!
This is one of Count Basie's most famous recordings. It is slow enough for you to play along with; note the sparse piano figures and 'fills'; the four guitar arpeggios (and odd one out); and the way the saxes move, particularly the baritone:
Thirty or forty years ago I was not so keen on Ahmad Jamal, considering him too 'cocktail', but now I love him:
There are, of course, many great jazz pianists - Art Tatum, Oscar Peterson, Teddy Wilson, Andre Previn (yes, he started in jazz and film music), Errol Garner, Dave Brubeck, but I'll leave you to investigate those if you want to.
The late Michel Petrucciani is lesser know, but has amazing technique. 'So What' is a modal theme from Miles Davis' 'Kind of Blue':
His version of 'Caravan' is amazing:
Another Michel I like is Michel Camilo, who crosses over to Classical music, having composed a piano concerto, and was at the Proms a few years go:
This is the finale of his Concerto:
Have fun!