Wasanelderonce has great advice. Remember, you don't need to be disrespectful, but you certainly don't have to act interested. Honestly, your aunt should be the one studying with you if she's your guardian. I seem to remember the WTS discouraging family "heads" (assuming your aunt is a JW and your uncle if around is not?) from having outsiders study with their kids since it's their "spiritual" responsibility.
Definitely use anxiety to avoid joining the school and becoming a publisher. If they force you on the school, try to find the positive in getting used to public speaking. Pretty sure you can avoid being a publisher since they actually have 2 elders meet with you to see if you are qualified. You can definitely answer questions incorrectly and kill that even if you are forced to go through the process.
Keep us posted!