Meeting with the client: The first thing you should do is have a meeting with the client to discuss their needs and goals for the animations. You should ask them questions about the desired look and feel of the animations, the target audience, the intended use (e.g. for marketing, education, entertainment), and any specific requirements or constraints they have.
Concept development: Based on the client's input, you should develop a concept for each animation. This might involve sketching out rough storyboards, creating mood boards to establish a visual style, and brainstorming ideas for the animation's characters, settings, and key moments.
Scriptwriting: Once the concepts are approved by the client, you can start writing the script for each animation. This will involve fleshing out the story, developing the characters' personalities and motivations, and defining the pacing and tone of the animation.
Pre-production: With the scripts in hand, you can move into the pre-production phase. This will involve creating detailed character designs, building 3D models of the settings and props, and creating animatics (rough animated storyboards) to test the timing and pacing of the animations.