Hi, Sweetie!
This -believe it or not... is one of the GOOD parts
of handling the death of someone you love very much.
You will recall good times, loved ones, and their importance
in all your lives.
It is also likely that -for one of them, the surviving spouse will be present, and have "thoughts"...
You will want to list the members of your family, near and far....
and it is so very important to those people that you do so.
Please be certain to remember close friends. By name. They will
never forget it... and these are the people who knew your parents
in a way -a meaningful way- that you could not.
They knew them as people. Not as "Janie's Mom", but as
"my best friend Susan". These are the people who talked
with Mom and Dad far into the night when you were sick,
or money was scarce... or Dad was ill, and your Mother
never let you see how afraid she was....
Like your best friend and you, now.
The rest is "automatic"... and is only important insofar as it is important to your Mom and Dad... schools attended, degrees achieved, positions held... these are things your parents will tell
you about as to which matter and which - not so much.
An obituary is as much for the living as it is to mark the passing
of the deceased.
The most important thing about an obituary is that you make
it clear how much they were loved, and by whom, and how
very much they will be missed.
You will have no trouble doing that. \
As to the order in which things are "listed"... your best source is someone at the newspaper working in "Obits". They do this for a living... and are only to happy to assist. Also, the Crematorium is extemely experienced and adept at this.
The "flow" come rather naturally, really...
"So-and-so died Tuesday evening..." (manner of passing -illness or whatever...) "and is survived by..." (wife/husband, sons and daughters, grandchildren, "X" number of greatgrandchildren...nieces, nephews, etc. If it is a large family, the further removed from the deceased, the more likely the number of grandchildren -as opposed to the individual names- is appropriate.... Parents -so and so, brothers, sisters, etc., etc.
(I have no idea how you feel about this of course)... but I think it's a statement of how very much your parents love you that they do this now, and that they have tried to spare you all that they can... no funeral, no "ritual", no outrageous expense when everyone knows
how much better that money can and should be spent - on the living.
(A Memorial Service is always possible... however-much later, if you feel it would be desirable. Call it a party; a celebration of their lives. That is up to you, and is suprisingly comforting to those left behind.)
It need only be a gathering of old friends in a mutual place,
where memories are shared.
As long as they are remembered they aren't "gone".
You will do this well when the time comes.
I hope it is a long and happy time from now. }:>