Japanese pronunciation is generally fairly simple, and you are pretty close to the money: sa = SAH, ke = KEH, stress on each syllable should be equal.

Vowels: A = Ah, E = Eh, I = EE, O = Oh, U = U, except when it's silent and I'm still learning the rules for that. Dipthongs pretty much work by running those sounds together. Sai = SIGH (sah-ee), for example. Hei = HAY (heh-ee).