Don't worry, we were all noobs once. Dealing with problems is how we learn and improve 😉
Its either a simple fix or something is broken.
If it all seems to fit together properly and you can't get it to work then its best to take it to the shop. 25mins is really close, you're lucky there.
They may not even charge you if its a simple fix.
(Make sure to keep it well hidden when transporting)