You sound like you can write on the fly. That is good. Do one clip at a time of the animation. Then start your next clip. You will have the 1st part of your animations building block. From their just keep building on that. Don't stop and try something else. You will loose continuitity.

The last thing in the world you need to worry about is what other people will think of it at this point. The most important thing is going for it. You can't take the next step untill you take your first step, unless you hop. And if you hop,  you miss how the other foot was suppose to work.

If you have a question. At any point bring it up, inquireing concerning the Program you are using where your having a problem. Someone here will be able to help you with it or direct you for the answer. I know you know that. But You can't let a problem stop you in your tracks because you ran into a problem. get the answer!

Untill I spotted poser, I was very much like you. I would start drawing out my storys. But never could finish them, because I lost interest because it took so long to do, and I could make a lot of apainted cells, that might look like crap. Then I had to paint the backgrounds get my camera setup. Poser was easy. Expince was up front. All you had to do was Animate, then if you didn't like it. delete it or redue the parts that needed to be improved. you didn't have to throw away a ton of painted cells that didn't turn out the way you had hoped.

When I started with Poser 4. I was free to mess up, and learn. noting lost after started other than time. This is why it is so important to have a story that intrest you.

My first Poser animation was about 15 minutes long. It had some good parts in it, and some things not so hot. But this you will find in doing animation. no matter what the animation or how many you have done. There will be a scene that you will have to figure out a way to do it. This is a never ending process. What you haveto work with, it drawing from the knowlege from your previous experiences. That will take you a long way.

I think you have the talent to make a good animation. Some people don't have that. They can move people around nicely, but miss the big picture. With your background, You have the big picture. now it is making it happen and not taking no for an answer. I see a number of talented animators here. A lot are in learning process. But if you really like animation, don't let anything stop you!         Good Luck!