Need help learning which sub forum to use for tensorflow questions

I am taking the new tensorflow course. I can’t post a link to it because I am new on the forum, but you can find it in youtube by searching for “free code camp tensorflow complete course”

At 30:11 he starts using a colaoratory notebook called TensorFlow-Introduction.ipynb ,

Maybe I missed something, but I can’t figure out how to open this notebook. If anyone here knows the answer that would be great, but if not, please tell me where I should post this question on the forum.