This is going to sound silly, but how do you you create a plant list.
Like what plants.we have.
What plants.we are looking for.
How to find others list.
How to view them, ect...

You have a plant list, your profile shows that you have 40 plants you added to your list from the database. You have them set as wanted and also owned.
To see other members lists, click on their profile. You can also go to a plant in the database you are interested in and see if anyone has it on their list. That is listed right above the QR code under the heading: From our plant lists:

Are you asking about creating lists within your list?

You can also browse people's plant lists here:
https://garden.org/lists/

The ones that fascinate me are those with just a handful of plants, usually want lists. I'm always curious about other people's wish lists. They are usually the kinds of plants one will never see at the average store that sells plants. I still have a list of those from my earlier garden days, before I realized they are plants I'll never see. Hey, I'm babbling... LOL!

I don't mind babbling lol. I do it all the time lol.