Hi @Lia_Sparks , sorry for the delay getting back to you!
So regarding the yellow dots on each org/workspace from your profile drop down; those simply show you that you have notifications in your relevant Inboxes.
Since you have all these listed under your profile, that means they are already connected under your Asana account; you have one Asana account which you can log in to using any of the email addresses that you have associated to each of these orgs/workspaces.
You can see a list of all your Organizations and Workspace in your ‘My Settings’ > ‘Account’ tab. So you can see which name corresponds to which type.
However, in order to work out which of your emails is connected to which org/workspace, the best way I can think of is to go to your ‘My Settings’ > ‘Profile’ tab, and below your name and job title you will see the email address. If you repeat this by going into each workspace/org one-by-one you can work out which ones are personal, work, trials or anything else you created. If you make a note of all these in a list, you can work out which is which (work/personal etc) and which space you actually use/need. If you do NOT need one of these spaces, then carefully(!) choose remove me from organization in the More menu.
As you may already know, in each org/workspace from your list, you have a unique Profile (photo, name, job title etc) as well as a unique My Tasks and Inbox. So for example, to add a task to your personal My Tasks, you will have to switch to the relevant org/workspace, which should also be available on your phone app too, by tapping on the ‘Account’ icon, lower right of your screen. Btw, this is another way you can quickly see all your profiles and the email address connected to each space!
Finally, in order to manage all your my tasks into a ‘Master My tasks’ list, have a look at this thread where you can vote and read up on some workarounds, including a 3rd party integration, Unito.
More on adding/removing emails is also available in the Asana Guide which is a great source for learning, as well as the online courses in the Asana Academy.
On top of all that, there are people like myself; Asana Partners provide consulting services to people and teams to get them up and running fast with Asana, helping their teams or entire organisations strategically adopt Asana and assist with the onboarding process, setting up key workflows and answering pretty much anything along the way! If you are interested, feel free to send me a personal message (via my profile picture) or reach out to any of the other great Asana Partners in this forum or in the Asana Partners Directory.
Hope this helps! 