To certify as an official, you must attend a rules meeting. The last rules meeting this year was held on November 6, so it is too late for you to become certified this year. Some club tournaments will utilize uncertified officials, so you might contact some tournament directors in your area to see if they might be looking for an official.
You can find additional information on becoming an official at the
KSHSAA website . To become Kids' certified, you must obtain your high school certification, plus attend an additional Kids' rules meeting immediately following the high school meeting.