I'm a little confused why you want to quit doing the breakfasts. Is it that you don't like the selection? You want to save money?
The reason I ask is that, yes, the closer you stay on the plan, ESPECIALLY in the beginning, the better it will be for you.
Going off plan THIS early (and no one is saying you have to wait until halfway to start swapping SOME things out), could be ill advised simply because you're not that familiar with the program and the meals yet.
You want to make things more appetizing? Fine, take a breakfast sandwich and add some FF cheese, salsa or guacamole to it. (Just make sure you balance out your fat and dairy to accommodate these changes.)
You wnt cereal? Fine, take a cup of any whole grain cereal that's about the same calories as a JC cereal and add fruit (try to stay away from high-sugar bananas) and some FF milk. I prefer FF half and half for richness.
Want to make yourself a scramble, fine, use two egg whites and add some veggies. If you use a whole egg, just use one.
My biggest concern is that because you're a good cook, you might be more tempted to "experiment" by adding things that you shouldn't.
Why don't you write out your recipes plans and bring them to your JCC to review? That way you'll know whether you're in the ballpark or have to tweak your plans to be closer to JC guidelines.
Let us know what you find out from your JCC. (BTW, if your JCC won't "let" you switch out your breakfasts, switch your JCC. And there's a difference between encouraging you to stay on JC and being pushy about it.)
Finally, again, I strongly urge you to stick with the JC breakfast for at least a few more weeks until you're COMPLETELY familiar with the plan.
And if you want/need to switch something out, switch out the snacks. Go with 100 calorie snacks that are cheaper. But for now, try to stay with the breakfast.
Just my two cents.
Phyllis