Value practice and repetition as essential skill-building activities.
This is the simple but hard part. As you've probably noticed, this multimedia creation is very complex. To make a project happen, you need a range of skills (or a team of people with a range of skills) including the ability to:
There's only one way to get good at this (OK, two ways): 1) study and 2) practice! But mostly practice, practice, practice.
Just do it! And never stop improving your skills (and building your team).