Diploma

Yes you can. The minimum eligibility requirement is 12th.
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.

Post Graduate Diploma in Pre-Primary Education (PGDPPED)
Minimum Duration:1 Year
Maximum Duration:4 Years
Course Fee:Rs. 9,600
Minimum Age:No bar
Maximum Age:No bar
Eligibility:
Bachelor's Degree or a higher degree from any recognised university. Rs. 9,600 (programme fee) + Registration fee of Rs.200
Objective of the Programme
To systematize experiences and strengthen the professional competencies of pre-school teachers;
To enable teachers to organize meaningful learning experiences for pre-school children;
To develop skills required in selecting and organising learning experiences;
To understand the developmental needs of pre-school children;
To gain knowledge and develop an understanding of various aspects of pre-school management. Project Reports
Project Reports are to be developed by students with the help of project manual and submission of the project report and viva will be at the concerned Regional Center.

HI Anand, Whatever University you want to join for doing B.Tech you have to check there admission criteria. Now I will tell you the eligibility criteria for B.Tech which you should have:-
B Tech- Eligibility Criteria
1.60% marks or equivalent in Class X in five subjects (Compulsory subjects - English, Mathematics, Science and Social Studies. The fifth subject can be indicative as per applicants choice. ). The board can be CBSE/ICSE/any other board in India or an equivalent board if from a country outside India.
2.60% marks in Class XII in five subjects (Compulsory subjects - Physics, Chemistry, Mathematics or Biology (PCM/PCB) & English. The fifth subject can be indicative as per applicants choice. ). The board can be any recognised board in India or an equivalent board if from a country outside India. In case of ISC board if an applicant has taken four subjects, aggregate of four subjects will be considered.
3.60% marks in PCM in Class XII if opting for CS. Or ECE streams, 60% marks in PCB or PCM or PCMB in Class XII if choosing BT and 60% marks in PCB in Class XII, if opting for Integrated M.Sc. CS.
4. Should be appearing in the board examination in March/April 2018 or should have the necessary mark sheets if you have appeared in 2016 or 2017.
5. Should have JEE Main/BITSAT/SAT/NEET/Any other State Engineering Entrance Examinations rank/score otherwise applicant will be required to appear in the NIIT University Engineering Test (NUET).
6. Applicants, who are appearing either for the Cambridge, IGCSE examination (A Level) or International Baccalaureate (IB) with a minimum of five subjects, including Physics, Chemistry and Mathematics and/or Biology, admission would be granted based on the predicted score.
7. Applicant should have scored Grade 4 in IB Board or minimum grade C in Cambridge IGCSE Board. Hope this will help you. :). .