Publish A Book or Don't Publish A Book?

As my age seems now to be rapidly advancing with no indication that the time I have remaining will be very long, I have been considering whether I really want (or really don't want) to gather my poems, stories, etc. into a book that (since there are no publishers knocking at my door) I would self-publish.  I do notice that there are quite a variety of ads popping up with a wide variety of rates.  I am undecided about whether my "writings" are sufficiently worthy as to merit the time, effort, and, of course, costs, involved in such a venture.  I note that some of the members here have already self-published using a variety of different methods.  I would appreciate any comments and/or guidance anyone might wish to offer.  I will be 80 in July, and although my health is not yet completely disabling I am beginning to have problems with my vision and with my bodily movements (back aches, balance, dizziness) but nothing yet that greatly affects my thinking (as far as I am able to tell.)  Any comments, suggestions, help, descriptions of your own personal self-publishing adventures would be appreciated.  Thank you all in advance!