Just a minor suggestion, but why not start with the saddle that comes with the bike. If you like it, keep it. If not, by the time you find out, you might have a better idea of what will work for you.
It may not come with pedals. If it doesn't, I would start with platform (plain vanilla) pedals till I got comfortable with the bike and riding experience again.
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Some people are like a Slinky ... not really good for anything, but you still can't help but smile when you shove them down the stairs.