Hi,
Have worked on a few of these explainer style videos in the past, I would suggest probably trying to trim the text down a little bit but I would be happy to work with you on that. I have a few voice over artists that i work with here in the UK but not sure if you would prefer an American accent? Happy to source as required.
In regard to deciding on style - I usually produce the first 20 seconds of the animation by way of a style guide and then work from there and make any changes as required.
Any questions just let me know
Cheers
Kirk