Creating an animation is a very complicated and time-consuming task. It is not only a question
of modeling and animating skills around the 3D software Blender, it is much more storytelling,
asset and time management, acting, editing and complex problem solving.
To not lose track during that demanding process it is very important to have a clear structure and
plan of what to do. Especially if it is a long term project with a fixed deadline you should set up a timetable. In the first couple of months you should get
used to the software and look for good literature.
There is a book called "Animating with
Blender How to Create Short Animations from Start to Finish". It is not a beginner's book but
it helped me a lot to get an overview of what is needed for an animation. I would recommend it to you.
3D Modeling in Blender