Kongu Engineering College Erode, Erode - community

I will be joining btech cse in a tier 3 college this year.. As of tech related stuff I know nothing I want to know all the details where to start as a beginner..? I am thinking of starting to learn c++ and then dsa kindly guide me if it's the right path or not and guide with yt videos playlists to learn all of it too..

So the scene is I am going to tier 3 clg this year(ece) And my percentage of 10 and 12 is 85 and 62 respectively. So I want to know is it enough for companies in campus placement or I am cooked Please senior who are in 3 and 4 year guide me