As per your query I am providing you some lists of short term courses after 12th commerce

Some of the diploma programs available after completing the 12th class with commerce as the subject are:

Diploma in business management
Diploma in catering
Diploma in hospitality and aviation
Diploma in fashion designing
Diploma in interior designing and decoration
Diploma in fine arts
Diploma in computer application
Diploma in journalism and mass communication
Diploma in engineering

Some new diploma courses after 12th that have picked up popularity among students having passed their 12th standard are:

Diploma in astrology
Diploma in palmistry
Diploma in various languages
Diploma in physical education
Diploma in yoga

Degree programs relevant to commerce stream

The degree programs available after completing 12th commerce are

Bachelor of Commerce
Bachelor of Commerce in Computers
Bachelor of Commerce (Honours) in Accounting and Finance
Bachelor of Commerce in Accounting and Finance
Bachelor of Commerce in Computer Application
Bachelor of Commerce in Banking and Insurance
Bachelor of Arts in Economics
Bachelor of Arts in Fashion Communication
Bachelor of Business Administration
Bachelor of Business Administration (Honours)
Bachelor of Business Studies
Bachelor of Business Management
Bachelor of Computer Application

Some commerce colleges of Mumbai:

Jai Hind College Churchgate
Sydenham College Churchgate
Hinduja College
B.J.P.C.I. College (Byramjee Jeejeebhoy)
Swastik College
Nav-Hind Junior College
Swami Dayanand College
L.S.Raheja College
Dahanukar College of Commerce
Narsee Monji College
Tolani College Of Commerce
Amann Junior College

And many more….