When my ds first started eating solids, we started with the cereal, and did that alone forever it seemed. Then once I introduced the fruits, I started mixing some spoonfuls of fruit into his cereal. Then I went to using a 4 oz. jar of fruit, adding some cereal, and that was his breakfast! Which I still do, by the way.
I don't think it makes one bit of difference to add the fruit to the cereal. In fact, I know a lot of people do add fruit because the cereal is so bland that I don't think it has much taste to it.
So, I think you're totally fine!