FGL data engineer Interview tips

I am not sure if i should be happy or nervous as i am having data engineer interviews with facebook, linkedIn, google and few other small-mid size companies. I am an ETL developer/data engineer and i work mostly with ETL tools / SQLs. After seeing current job descriptions, i started learning python and should be able to solve easy questions and some times medium complexity ones on leetcode but not hard ones(i feel its almost impossible) Can someone please suggest me what can I expect in initial coding rounds with google and linkedIn. Do they still ask complex python programming given that i am a data engineer and not a software engineer. Please help!