Generally the more lean the more likely to chair. Hold something heavy straight arm over your head than slowly lower your straight arm down your side. A lot more strength is required as you go. Similar with the tree, the more the lean the greater the internal stresses.
Your tree poses not only the risk of chairing but also bouncing. Either of which can send you or your saw flying. A flying saw can be just as dangerous as the tree.
This is not an impossible tree just one you shouldn’t at your current level of experience take on. I have little doubt that with growing experience you will be able to size up and safely fall trees, even this one. But you got to work your way there all the while developing your judgment and proper reflexes.
No disrespect intended to any here, but if you are relying on armchair advice for a dangerous activity (and you appear to be), it is far wiser to listen to those who have been there and hold you back than those who haven’t and urge you on.
Ron