After 12th, You can do a graduation course animation/multimedia to get your basics strong and futher choose your specialization of interest. Some of the other courses you can pursue are:

• Bsc in Multimedia Production and Technology
• Bsc in VFX and Animation
• Bsc in Animation and Gaming
• BA in visual effects and Gaming
• BA in digital media

There are various certication and diploma courses as well in animation.

Some of the colleges which provide the above courses are:

• Arena Animation
• Maya Academy of Advanced Cinematics (MAAC)
• National Institute of Design
• Industrial Design Centre, IIT Bombay
• Picasso Animation College
• School of Animation and Visual Effects

You can check their official websites for admission, application dates and eligibility criteria details.

Good luck.