What a good decision!
Some years ago I was browsing in a second-hand bookshop in Amsterdam. There was background music - piano music which really caught my imagination. On enquiry I found that they were playing a CD of Haydn sonatas, played by a Canadian pianist, Peter Allen. I have always liked Haydn, but this started me to think more seriously about his sonatas. Despite this discovery I did not attempt to play them until years later.
Some years ago, when I acquired my Broadwood square piano, a friend said to me: "you should play Haydn on it". I have done exactly that, and not regretted a moment. I have concentrated on two sonatas, both late ones: Hob XVI/50 in C major and Hob XVI/49 in E flat. I find them both infinitely rewarding (and just right for the piano, which was made just a few years after their composition).
In terms of advice, I would just say this - pay very close attention to details of articulation and phrasing, and to the little "wedge" marks above individual notes. This is ultra-important if the sonatas are to sound as intended.
I have the Wiener Urtext edition and love it. Everything is laid out extremely clearly.
Enjoy your Haydn journey!