As a Human Monk, if I choose Natural Ambition as Human Feat, and the two Ki feats as class feats, does it increase my focus pool to 2?
The text of both of the feats is clear about giving you a focus pool with 1 point in it. However, the call-out box on page 302 of the core rules ("Focus Points From Multiple Sources") tells us that if you gain multiple focus pools, then you add their points together:
If you have multiple abilities that give you a focus pool, each one adds 1 Focus Point to your pool.
In your example, if you took both Ki Strike and Ki Rush you would have a focus pool of 2 points.
Be aware that no matter how you do it, the maximum size of a focus pool is 3 points.