You can do b.tech with less fees not more than 10 lakh fee of btech is really less and affordable in many central and state government colleges of btech like bhu amu.if you cant afford you take education loan.

Other affordable options are BSC Bioengineering, Biotechnology, BA LLB, etc.for all these courses you have to take CUET entrance exam for admission.

Or you can explore other options here

https://www.careers360.com/careers/articles/career-options-after-12th-science-pcm-counar