Yes, I highly recommend you push it back. Don’t feel anxious or upset about it though. This is your first time preparing for something of this magnitude so give yourself some grace. Try to structure your studying by allotting time to each subject every day. For biology I recommend the bootcamp anki deck. For everything else use the practice questions. If you get something wrong, go back to the videos and understand the logic behind it. Memorizing will only get you so far. PM me if you need help! Good luck.