Engineering

Yes, many online learning sites offer courses in Data Science and Cybersecurity especially for the second-year B.Tech students. Noticeably, sites such as Coursera, edX, Udacity, and LinkedIn Learning have specialised programs in these areas. You will get various courses from beginner to expert level on Data Science, usually with projects hands-on- done by renowned schools like Stanford, MIT, or IBM. Courses in Cybersecurity include Cybrary, Udemy, and Coursera, with a focus ranging from introductory aspects to advanced topics such as ethical hacking, network security, and cryptography, respectively. These courses can be flexible enough to be incorporated with respect to regular studies. 

Normally, you need to have PCM (Physics, Chemistry, Mathematics) as your part of your class 12th study to get into a B.Tech programme in Computer Science Engineering (CSE). As you have finished your 12th with PCB (Physics, Chemistry, Biology), though, you may not be eligible for direct admission into a B.Tech CSE programme for many institutions.

University-specific criteria, however, may allow enrollment into the B.Tech CSE programme for other ways for students who completed their plus two with a PCB background. You may probably be suited to apply for:

B.Tech in related branches, which is Bioinformatics, Biomedical Engineering, or Software Engineering-these may have more lenient requirements for admission.
Bridge courses or foundation programs: Some institutions provide preparatory courses for students of PCB students to catch up to some of the necessary mathematics and other technical knowledge for CSE.
Direct Admission: Several private universities or colleges may accept the students from PCB stream into B.Tech CSE based on their entrance examinations or other specific criterions. It would be wise to check with the individual institutions regarding their admission process and eligibility.
And given your 12th percentage, which you say is 64, you might still have a chance of getting into one of the institutions that offer flexibility or different forms of special pathways for less traditional backgrounds. Confirm this by checking specific universities that provide admission criteria for PCB students.

UK is a home for some of the best electrical engineering programs and one of them is theUniversity of Southampton, which is ranked 9th in the UK and 97th in the world for electrical engineering. How electronics and computer Science department work together to offer wide range of subjects to students.  The programme balances theory with practical work and the syllabus is designed and adjusted as per industry needs.The master's degree in electrical engineering follows the same curriculum as the 3-year BEng, with an additional year.The university has renowned teaching staff and strong relationships with employers and one best high voltage labs in UK. The university has a Careers Hub that runs an annual careers fair and a startup incubator called Future Worlds. The University is also partners with  Institution of Engineering and Technology Power Academy, which gives you the chance to apply for a company-led scholarship that provides financial support, paid summer work placements and industry mentors

There are heaps of resources that can inch you toward preparing for GATE. Some of the best books for specific subjects include :-

1. *Inorganic Chemistry* :- by JD Lee "Inorganic Chemistry".

2. *Environmental Science & Engineering*: "Introduction to Environmental Engineering and Science" by Gilbert M. Masters.

3. *Mathematics and Engineering Mathematics*: such as "Higher Engineering Mathematics", published by B.S. Grewal, and attract attention.

Also, you must solve the previous year question papers because they are an important way to know about the pattern and level of the exam. Download question papers from official GATE sites.

You can take a few *mock tests* as practice since it gives the feel of the exam and works pretty well for time management. PracticeCheck is one of those online platforms that provides free mock tests for you to test your preparation.