hi I'm studying 12 std subject commerce how can become judge

Hello aspirant,
Glad to learn about your interest.
In order to be a judge you must clear 10+12 with minimum of 50% for general category
45% for sc/st/obc.
Earn a law degree.
Pass state judicial services exam held by respective state governments from time to time.
Afe sould not be less than 21 years.
All the best.