Hi, community

I got an offer from Google for the SWE L3 role. I am a new grad who is from a non-CS background and am about to graduate. I worked hard on my DS and Algorithm skills to get that offer and I am extremely happy and thankful to codeforces for helping me. Now the reason for my worry is that I do not know anything other than DS and Algo and in college, I mostly focused on competitive programming. I still have about 2 months before I join Google. What should I do in this available time so that I do not look like a complete dumb in front of other googlers?

Should I learn some web development, machine learning, or what...I need guidance please help me.