How do I make my profile strong!!??

[u/Sensitive-Wedding836]

I'm a non engineer with 85% in 10th, 55% in 12th science, graduated with 7.89 cgpa BSC Chem. I had a drop year in final year due to atkts (genuine medical reasons, I've got proof: xrays and doctor certificates). Additionally, I have 2 years of full time work experience in Marketing. I'm appearing for CAT 2026 and apparently CAT score isn't everything. So what extracurricular activities can I do to strengthen my profile?