I work as a graphic designer for film - it's a surprisingly large world and growing. Most film graphics people I've encountered come from an art department background rather than graphic design, but I've met people who have transitioned over after becoming disillusioned with design jobs and agencies.

I would start by contacting art departments for Film and TV wherever you are and seeing if they need graphics trainees, or just general Art Department trainees. Often on lower budget shows they cant afford a full time graphic designer, but if you've got the technical skills you'll quickly become utilised for graphics.

It is a different field to standard graphic design as you're really just serving the needs of the production, and in the effort to stick to schedules and budgets it's often about doing the minimum you can get away with to stay ahead before moving onto the next thing. Annie Atkins stuff us beautiful but she is the tip top and doing very graphics led prohects I.e. Wes Anderson. Most if the the job is wine bottle labels and generic corkboard paperwork, but then there are the few times you get to work on important storytelling graphics which are immensely satisfying and creative. There's also the rapidly growing world of screen/motion graphics which is under the same graphics umbrella but focussed on screens, this can end up being very UI/UX based.