Will you help me choose an authoring tool?

I  want to create one single product (to sell), and I will be the only author.  I'm paying for this myself, out of the grocery budget, so cost certainly is a factor.

I want to create an educational product for children that will be in the format of a graphic novel (comic book) where the kid can click the speech bubble to hear the text.  90 percent of the course will follow this format.

I anticipate making this available online through some sort of a login.  I do need enough tracking capability so that the learner can start back where she left off last time.  I don't need extensive testing or record keeping.

I used to be a corporate trainer back in the 80s and 90s, and at that time, I had some training in CBT; but, clearly, things have changed a lot since then.  I don't even know where to start looking.  (And, frankly, I don't want to spend six-to-eight months in analysis as we did in Corporate America.  I don't have to justify my decision to the selection committee; I just have to afford it out of my grocery budget.)

I am a competent computer user (and I have a 14-year old technical guru holed up in his bedroom); but I am not a technical wizard myself.  Java and HTML are not in my future.

Would someone be so kind as to make a recommendation?  And if this isn't the right place to ask, could you at least point me in the right direction?

Thanks in advance.

P.S.  Is ReadyGo a candidate?