Joe, thanks. I expect the recommendations will be very specific. I remember something about a paste from a video. I compartmentalize tasks like this and just haven't found the right time to figure it out yet.
I bought an adult tricycle. It's 24", 1 speed, and folds in half. It has a basket in the back of course and I plan to use it to get exercise, go the mailboxes, haul garbage to the dumpsters, and I've decided I'll ride on the sidewalks to my nearest CVS and Publix a little more than a mile away when I get lights and reflectors to make it safe. It's not assembled yet. I made a deal with housemate to assemble it. The bike shops balked at doing it and offered me prices of $240 and $250. I couldn't pay that. That would be ridiculous.
I haven't had a bike in forever. I'm looking forward to it.