BBA

Dear Rahat, Some top colleges for BBA are -
Affiliating University & Seats& Exam are-
Indian Institute of Management (IIM), Indore
Indian Institute of Management (IIM), Indore
120
IPM Aptitude Test
Shaheed Sukhdev College of Business Studies, Delhi University
185 (BMS)
90 (BBA FIA)
DU JAT
Keshav Mahavidyalaya, Delhi University
46
DU JAT
Deen Dayal Upadhyay College, Delhi University
46
DU JAT
Gargi College, Delhi University
46
DU JAT
Sri Guru Gobind Singh College of Commerce, Delhi University
40 (BA Hons. Business Economics)
46 (BMS)
DU JAT
HR College of Commerce and Economics, Mumbai University
120
Direct admission based on candidates' merit
Jai Hind College, Mumbai University
60
Direct admission based on candidates' merit
Mithibhai College, Mumbai University
120
Direct admission based on candidates' merit
KC College, Mumbai University
240
Direct admission based on candidates' merit
Symbiosis Centre for Management Studies, Pune
Symbiosis International University
300
SET BBA
Symbiosis Centre for Management Studies, Noida
Symbiosis International University
300
SET BBA
Symbiosis Institute of Computer Studies & Research, Pune
Symbiosis International University
90
SET BBA
Anil Surendra Modi School of Commerce, Mumbai
NMIMS University, Mumbai
720
NPAT BBA
St. Xavier's College, Mumbai

In general Candidate Profile for Freshers for cabin crew is as under :
Age:Between 18 and 27 years
Minimum Height:Men - 170 cms and Women - 157 cms
Weight:In proportion to height
Educational Qualification:HSC (10 + 2). Candidates who are appearing for their HSC examinations can also apply
Physical features:Pleasing personality, clear complexion (scars, pimples and blemishes not acceptable) and good eyesight
Marital Status:Unmarried
Language skills:Fluency in English and Hindi. Proficiency in a foreign language will be an added advantage.
Interactive skills:Excellent communication and good interpersonal skills
Nationality:Indian citizens only
Passport:Must possess a valid Indian passport or should have applied for a passport
Mandatory Documentation :Must possess a Pan Card and Aadhaar Card
So that becomes very clear that it merely requires some grooming to get the job of a cabin crew. They don't demand much from candidates.
You should be interpersonally sound and capable to handle people from different cultures.
Cabin crew is the face of the airline. Coz they face the passengers for the first time.
Foreign languages like German, French, Russian, Arabic, Chinese and Japanese, Can allow you to get an edge over others.
As this allows the airline to roster you on routes where such languages are spoken.
For Cabin Crew Training
1. Flying Queen Air hostess Academy New Delhi
2. Wings Air Hostess and Hospitality Training Vadodra Gujarat
3. TMI Academy of Trave Tourism and Aviation Studies, Mumbai
4. Air Hostess Academy, Banglore, Karnataka
5. Universal Aviation Academy, Chennai, Tamil Nadu.

Obviously, you can but the main question is it a right decision or not? Follow some step to analyse.
If you want change your course only due to homesickness then I don't think this one as a good decision because up to how much time you will this problem of homesickness after few years you have to go out to pursue your dream.
If you are doing it for degree only then you can go for it but you have to decide your field in which you want to go.
If you are getting some problem in hostel like loneliness, food, etc. then discuss with your parents about it.
As far as curriculum B. Tech. very good subjects/courses while doing B.B.A. you will be re-reading 90% of your subjects. While After B. Tech. you can do M.Tech. in various specializations like AI, CS and IT.