Most people pursue an MBA after a BTECH degree gaining a significant increase in their salary too. Your existing B.Tech degree will significantly enhance your profile and make you eligible for a wider range of MBA programs.Gain experience in a relevant work, preferably in a field of engineering or management, and  boost your profile as much as you can.
CAT/GMA are must for the top MBA programs, but they are quite challenging. So, focus on preparation in quantitative aptitude, verbal ability, and logical reasoning.You can give other entrance exams for MBA like XAT, CMAT.A few certifications like PMP, Six Sigma, or software tool-specific certifications makes your profile more valuable .Projects, internships, or extracurricular activities demonstrate your skills and interests.You can Consider Tier-2 and Tier-3 B-Schools.You can get into the international colleges too if you want but you have to study hard.
A path to a top-tier MBA is not easy, but with focused preparation, strategic planning, and a strong performance in entrance exams,well it is definitely possible. MBA