About Jill's background. Jill roughly said to MC that having
money (possessions) doesn't mean anything. What she meant is that money doesn't necessarily bring happiness and/or doesn't solve all problems. She obviously knows the worth of money and she is trying to raise funds to start a support group campaign.
Now, what would that support group would be for?
Now, where does she come from? Why would she wish people had done the same for her too? My answer for that is that she was a victim of bullying herself, and she thinks she can relate to what happens to MC, and doesn't want him having to suffer what she did in her past. And so, my conclusion is that she may be wanting to start a support group campaign for victims of bullying, or something related to that. And maybe her connection to Bella is Jill having been helped by her when she was the victim, hence why she has Bella in such high regard and sees her as a great friend and wonderful person. Just a thought.