I have no experience with this, but happened to have seen an interview with Ludwig Minelli, the founder of Dignitas (an organisation for assisted death). The man is 90+ and still fighting for this right. I believe I saw it in a video format, but I think this was the interview - I think it's worth a read.
I'd suggest you look up the contact for the various organisations and reach out with your situation and questions to see what they say. They're likely to be much better sources of information.