I am an elder and wanting to prepare for my “transition” looking for what to do, what is available, what all eventually needs to be addressed.

Call your Office of Aging. They may have someone who can take you thru it. If you own a house, or have assets over a certain amount, there's a way to protect them against having to probate them. Bank accts can have beneficiaries (POD). A Will is needed otherwise. Assign someone your financial and Medical POA. Prepay for funeral. Or at least leave a letter outlining what you wantdone. No gifting should be done if you think u will need Medicaid in the next 5 years. That means no turning over your house or car to someone. Start with O of A and then may be an Elder Lawyer.

My doctor gave me the web address of a doula that does end of life coaching. Not just about emotions but also about practical help.

She is at finalphases.com

If the OP is considering final arrangements: we bought and prepaid for our Final Exits 25 years ago. Prepaid is still an option (try Google--"prepaid funeral/burial") but wouldn't be surprised to find that there are extra fees at this point; there almost always are for any service now.

Do you mean dying or do you mean after you are dead?
Are you thinking of pre planning services and burial or cremation? Funeral directors can help with that.
As to pre-planning much else it is almost impossible given you cannot know what your physical and mental condition will dictate in terms of needs as you travel on.
More specificity would help us answer you better, I am thinking.

If you're talking about your final arrangements, contact a funeral home. They have all sorts of tools to help you, and they can steer you to what you need. I've found them to be very helpful.