Welcome to the community. I manage the tutorials guide and YouTube channel, and you’ll find there are others here who contribute videos on their own channels.
We don’t have any specific tutorials on a Quest / Inventory system on our channel/guide, but will happily put this on the bounty board and will get to this as soon as we can.
In the meantime maybe someone else on the forums can offer some insight?
You can find a list of video tutorials on this post:
Good luck and I’ll post back as soon as we’ve got something to help. If you’re not a subscriber on our YouTube Tutorial channel, please hit that subscribe button where we aim to upload new content roughly every week.
A spoiler for what’s next, adding sound to your project.