Anubhavmax: thank you for sharing your experience and concerns.
Optimally, your documented extracurricular activities should be recent and aligned with your personal and/or professional values. Further, a great extracurricular should provide you with a professional reference - which will address your credibility concerns. (A good reference will attest to your character, strengths, and weaknesses.)
I suggest that you get involved with an extracurricular that speaks to both your character but also your professional potential. One such activity is serving as a volunteer business consultant for a small business or nonprofit in need of business planning or strategic development assistance.
Look into the following three organizations that recruit, train, and match pre-MBA professionals like yourself with volunteer consulting opportunities:
1) SCORE
2) Taproot Foundation
3) USA Leadership Corps
Thank you and best wishes.
Maxwell Roper
Outreach Director
USA Leadership Corps (USALC)
www usaLeadershipCorps org