It was a pleasure to stream your game! There was a lot of work that went into this entry for the jam, and the length was quite ambitious. There were a few minor grammatical issues that I would recommend revisit g at the end of the judging period, but nothing egregious; like my own games, it's just hard to notice them sometimes until you see them on stream.
I don't necessarily believe you don't have room for both the A and B plot lines in your story, but in this case it may be better to focus on one a bit more than the other. It may be a bit stronger narratively to focus more on the relationship with the mother or the voice of the forest, and use the other plotline more as a means of reinforcement for the main one. I think it may just be that it's a bit further into the story before the voices become central to the plot. That being said, all the pieces that are there are decent. Some of it also comes down to the difference between writing a short story or a longer novel... in a short story, juggling multiple plot points can become difficult.
I personally don't mind the reluctant chosen hero trope, but I've learned it is usually best not to quite spell it out so literally. Even so, many beloved series tend to do just that, so you're in good company at least.
Also, as one of the jam artists, thanks for using our sprites! I love seeing all the creative characters everyone comes up with, but it's also nice to see our handiwork pop up from time to time.
Good job, and I look forward to seeing more of your work in the future. And congrats on making it through your first game stream! It can be a bit intimidating (I know mine was during May Wolf last year), but just bear in mind that we're here to help each other grow and improve.