You have a background in film, that’s good and does increase your chances.
One thing I could add. The 3D animation process is divided into multiple steps, some of which can be done independently to some extent. If you can find, lets say, someone to make the characters and someone else to make the sets, these two jobs can progress at the same time (you would just need some reference images to give the two artists for a consistent art style).
If you lose an artist on the production, the best time may be in between steps. If you have all the sets and characters fully built and the artist(s) drops from the production, you can find someone else for the next steps (rigging and animation) and give them the files and it should be fine as long as the previous job wasn’t botched.
–
The steps of a 3D production from your end:
1- Pre-production. Writing the script, deciding on an art style.
2- Modeling. The sculpting and fabrication of the sets and characters. Can be done by multiple artists if they are coordinated on art style.
3- Rigging. Turning characters from rigid statues to useable puppets that are ready for movement and prepared for animation.
4- Preparing for animation. Recording the voice acting. Even better, recording videos of actor performances, making a crude version of the full movie (no need for sets or costumes, just filming the performances is good). Having a pre-recorded performance from the actors will help inform what the animators need to do and give them a timing and poses to start from.
5- Animation. Replicating the acting performances in Blender, creating all the movements of the film. The voice acting is already recorded before this step, so the lips of characters can be animated to match. This can be a labor intensive step, especially if you want quality, and might need someone more specialized.
6- Special effects. If you need water, fire, smoke, destruction etc. in the film, it’s the time to add it. Depending on the complexity, this might need help from a specialist.
7- Rendering. This is the step where the scene is lit and the final images are generated. This step needs lots of computing power and waiting, as the lighting needs to be calculated for each frame of the movie, a virtual simulation of photography. Better be sure you have what you want before commiting to it, because you are going to wait for the images to be generated each time. It pays to make a low quality preview first to make sure the sequence of each scene is correct.
8- Editing. You assemble the generated images and edit the movie the same as you would a live action movie.