Website disappeared from Google after index.html update

I am a Computer Science student with very basic web-dev experience. I have a personal website that I deployed on the web around 3 weeks ago. I was able to rank on the first page when the Google query was my name.

I updated my website yesterday and now the website is not anymore on Google. I tried to type and it’s not there. In my opinon, it may be three different things:

1) I uploaded a very large image by mistake. However, the image was not used in the website, it was just on the server. Not sure if this can affect the speed and therefore the ranking.

2) I added “language=eng” in the “<html>” bracket section

3) Just the way I am uploading things on the server. I am using FileZilla and just overriding old files with the most recent files every time.

Any idea?