Hi all, got a general question to ask about research framework. Can anyone help?

Hi all, I am so glad that I found this forum at the verge of depression and lost. I started my phd 3 months ago, am I considered still new? I engaged with my supervisor whom I deem very well-known for publications and post-graduate supervision. However, I find myself so lost when I ask questions and all he did was tell me to read. Of course I read and because I read, I have questions. I am not sure if this is common?
Is there anyone here who can share their experience with me and like where I can find really basics stuff on post-graduate?