MBA/PGDM

Please visit Techno India DN 25, sector V Saltlake. Fees is around INR 4 lakh for MBA.

But, with this fee, there is no good college in Gujarat. But, I will give you the list of colleges having low fee. Check out this link for colleges having fee between 1-2 lakhs:
https://www.shiksha.com/mba/colleges/mba-colleges-gujarat?rf=filters&ts=3617480&st[]=109&fe[]=f2&ed[]=et_20&uaf[]=et_dm&uaf[]=location

Yes, you can do it after any Bachelor's degree. You can pursue in any field depending upon the interest that you have. It can be of finance, strategy, marketing, etc. I have seen many friends of mine who had done marketing and are currently working in big pharmaceutical companies. So, it's all about your interest.

You are advised to do a short-term course on computer hardware maintenance and repair so that you have good hands on exposure on PCB repairs. This knowledge will be helpful in circuit design and its practicals.

MBA degree course is open to all type of graduates as its is generic course. You can chose any graduation degree of your choice to seek admission in MBA at IIM. By the way, most of the IIM graduates are Engineers.

An MBA can be done after any degree but better the package would be a commerce degree and MBA.

B.Com honors would be better if you want to pursue MBA from IIM as it will give more weightage while getting admission. Also, B.Com (Honors) would be a good for career prospect as well.

I prefer RNSIT IT is some how better.

Check out this link:
https://www.shiksha.com/mba/course/master-of-business-administration-sinhgad-institutes-pune-sinhgad-management-institutes-mba-off-karve-road-136443