CBSE 12th

Yes you can pursue BCA at LPU after Class 12, and honestly if math feels a bit weak that should not be the end of the road, so long as you have a real interest in computers and programming. At LPU, the BCA program is made to take you step by step, so you gradually learn programming, database basics, web development, software engineering, and other core IT areas. There s also a lot of practical learning, like projects, so it doesn't stay only in theory. If you enjoy working with computers, and you're ready to practice consistently, then BCA can be a solid choice, and it also sets you up for higher studies such as MCA, or for careers in the IT sector.

Yes, you might be eligible to apply for B.Tech CSE at Lovely Professional University, if you have cleared Class 12 with Physics and Mathematics and also satisfy whatever the university has as current eligibility conditions. With 57.4% in Class 12, you are kind of near the usual eligibility band for many B.Tech programs, but the final say can change based on the exact subject combination you studied, plus the admission rules for this ongoing session.  

If you had PCM in Class 12 (Physics, Chemistry, Mathematics), then it is a good idea to go for it and confirm your status by checking their admission portal, because that's where they list the fine print. You can also think about taking LPUNEST, since it may support scholarships and other admission advantages, so it's not only about eligibility, but also about the benefits you can get.