My thoughts are the dead guy shouldn't get to decide how they're grieved cause you're dead and the people who feel like grieving together should just like...not do a whole ritual thing. But since the whole ritual thing is what would be decided for me if my parents outlive me, I need a contingency plan. I will make my funeral wishes absolutely impossible to tske seriously but also legally binding so it's either no funeral or the dumbest shit anyone has ever been to. So far I've got thar I want it held in a bouncy castle, and that representatives of as many religions as they can get to do their funeral stuff at the same time and to only play Bolt Thrower
I'd say donating your body to a college that's good about recognizing Palestine could do a lot of good. I think allowing a viewing and then doing a very low carbon funeral could be good. Like not getting embalmed would be cheap and leave your family too financially be okay.
I'd say ensure your pronouns and identifying traits are visible and written down legally could be another thing to consider.
I have personal opinions, but I hope this is a good start..