Or any other way where I can easily find one of my older posts to make an edit. Only way I've seen to do it is from the dashboard.
July 2020: For me I've been searching and finally found the answer. Basically if you want to edit old posts without having to scroll forever down your posts through the dashboard, you can just go to mass post editor on the right side when you click the person icon(top right corner). In the mass post editor, you can navigate easily through your old posts by filtering it by months/years on the top of the page. Once you've found the post you want to edit, open it in a new tab. You also have to be logged in, or else it won't work. Once you've opened the post in a new tab, you'll see a bunch of icons in the top right corner again. (reblog,embed,a pencil which means to EDIT,a trash can to delete the post,and a house to take you back to your dashboard) CLICK ON THE PENCIL. Then you'll be able to edit that specific post! Hopefully I explained it well enough!