Hindustan Institute of Engineering Technology

Hello Riswana,
It's indeed heartening to see that you are still interested in studies in spite of 2 years of break after your 10th standard. Yes, you can seek admission for Diploma course in this college that you have chosen. This is a good course and I suggest you should take admission in this so that you complete your Diploma at the earliest. I am attaching a link that will give you all the required information about this college and the courses that it offers.
https://www.shiksha.com/college/hindustan-institute-of-engineering-technology-st-thomas-mount-chennai-2952
Best wishes to you.

In today's era, everyone can pursue Diploma courses in software development regardless of the background. If you already have some courses in mind, then go further for them. Otherwise, I am mentioning some courses for your consideration:
Diploma in Software Engineering.
https://www.edx.org/school/iitbombayx
https://www.coursera.org/browse/computer-science/software-development.

Hindusthan/Hindustan College of Engineering & Technology was established in 1999-2000. It is located in Coimbatore, Tamil Nadu. The institute is managed and run by Hindusthan Educational and Charitable Trust. It is affiliated to Anna University, Coimbatore.

Qualification
12th
Additional Details
Mandatory Subjects : Mathematics, Physics
Candidate must have secured at least 55% aggregate marks in mandatory subject along with any one of Chemistry/ Biology/Computer Science
Admissions
Admission is through counseling based on the rank obtained in Uttar Pradesh State Entrance Examination (UPSEE).
10% seats are filled through institute based on rank obtained in JEE Mains.
15% seats are filled through management quota based on marks obtained in 10+2.

Hello Devendra,
Yes, this university offers this course and the criteria mentioned is only graduation in mechanical or aeronautical engineering. I am attaching a link that will give you all the required information.
https://www.hindustanuniv.ac.in/

Hello Nethaji,
I am afraid, your wish is not going to be fulfilled. It's next to impossible to shift college midway.

Hello,
Please refer the link to get more insights of the colleges and branches.
https://www.shiksha.com/resources/college-comparison
However, Hindustan College of Engineering is better.