CCNA

Hi,
You may get enrolled for CCNA training course which would cost you around 10k. Then CCNA certification cost would come around $150, each ICND1 and ICND2.

B.Tech electronics & telecommunications engineering (ECE) is the preferred educational qualification for a job in telecom industry at junior management levels. Diploma in ECE is entry qualification in supervisor roles. ITI in electronics is entry qualification for technician in the telecom industry.

Hi,
You need to grab the current dump and do lots of practice. You need to make your base and logics strong enough because all CCNA questions are based on practical and logics.

You can refer to the below mentioned link:
https://www.shiksha.com/search/?q=CCNA&c=10&sc=101&sa=97^0^74^0^0^0&ts=1588680&rf=searchwidget&ct[]=97&sp[]=74&ldb=l-74

It has not age limit. You just have to work hard.

You must do basic certifications like CCNA and Red Hat certifications. You can probably prefer to do MCA. This can give you better opportunities in the market being a Masters graduate.

It depends on what have you done in Bachelors degree and what was your stream in school?
Assuming you go for MCA, you should not target CCNA as it is the most basic level of certification. You will not gain any price in the market. If you look for CCNP, then it is a real game in knowledge and job. You will get better job, work, and salary. CCIE is the top class certification among all.