Feeling Lost in My Final Year of B.Tech - What Should I Do?

I'm in my fourth year and just started the first semester of my B.Tech in Computer Science. Honestly, I feel overwhelmed because I don't have any strong skills yet—my knowledge is pretty basic. I've only touched on HTML and CSS, and I haven't dived into Data Structures and Algorithms (DSA) with much seriousness. I began learning C++ for DSA but have only gotten through the basics. My grasp on core subjects is shaky, and overall, I'm not doing too well academically. I ended my third-year second semester with a GPA of 7.9, but I feel like it's too late for me to catch up. Is there still hope for me? What steps can I take to improve and gain some skills?