A very good question, with no good answer. If I knew one I would be advising the prime minister, not writing on this forum :)
I imagine a model closer to the West Bank, where there’s some joint Israeli- Palestinian control. It’s not great, but way better than the current situation in Gaza, and hopefully might de- escalate somewhat the situation. In such case the blockade will probably be lifted, and Gaza might get some actual economic development.
Thanks for your concern! As a private citizen I don’t know of much you can personally do (I struggle to find such things myself).
I think the most pressing concern is to force Egypt to open a humanitarian corridor from the Gaza strip, so that refugees can run away from the battlezone, saving their lives and making the war easier for Israel. So far, they have refused. Serious international pressure on them might help. I had a short discussion about this in a parallel post in Less Wrong, and I think this is one of the highest life saving interventions right now.
In addition, in recent days there started efforts to deny the massacre of last Saturday. Since some of it was streamed on Tik Tok, Telegram and more, and some are deleted in effort to destroy evidence, high ranking managers in social media companies who could prevent that and preseve the evidence would be immense help.