Diploma

If you want to get employed then join some CA firm practicing income tax and GST as an intern to learn taxation. There is a lot of scope in the field of GST laws and practice ( Learn as an intern with CA Instead of doing a Diploma). Instead of taking employment you may also pursue higher education say professional courses like LL.B. ( specialise in taxation) and CA etc.

You have to give first priority to Jobs after completion of Diploma course. Because the gap of one or two years after completion of Diploma can put you behind the lacs of students. Today competition is very intense, hence needs to be careful about the jobs. Railways, PWD, CPWD, State electricity boards and government PSUs are the major recruiters.

You should go for B.Tech lateral or Part time courses with AICTE approved colleges. The degree will helps you in your career progression.

You may prefer for jobs and starts your preparation accordingly for competitive exams. Railways, BSNL, Bharat electronics, DRDO and other private sectors are the major recruiters. You can opt for B.Tech lateral or Part time after getting a job. So your first priority should be for getting a suitable job.

Hello,
https://www.shiksha.com/mba/ranking/top-mba-colleges-in-india/2-2-0-0-0
This link contains the details of all the top-ranked MBA colleges in India.

Please use given link for list of good college as per your requirement
https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.shiksha.com/distance-mba-mba-distance-education-chp&ved=2ahUKEwiK7N2D9ajiAhXk73MBHSrUA8UQFjAAegQIBBAB&usg=AOvVaw3R3Ov6LtQwGFTkhh-DEKmW

By clearing NATA you can get a good college.

Hello,
Kindly go through the below link for all the information:
https://www.shiksha.com/engineering/colleges/diploma-civil-engineering-colleges-Delhi-ncr

According to my knowledge, you should choose NIT Diploma. You will get good opportunities ahead after this.