Kelly,
I owned the 403 for a few months and even tho it is a great keyboard at its price point, it doesn't take long to tire of if you want to load new styles. It's internal memory is quite limited and even tho you can load new styles you can only add a few because of the low memory and you can only load and play one new style at a time. You cannot go from one new style to the next like you can on the more advanced keyboards which have USB to device. My suggestion is to start with the PSR500 or PSR700 - something you will have more time to enjoy growing into, rather than out of.
Another thing I've noticed with the 403 is that it will only load simpler styles that use lower memory.

That's my opinion, for what it's worth.
Good luck and have fun
Tim