Right now you can fully hide the line with font size 1 and custom line spacing .06, I visually verified that saving as PDF shows no whitespace at the top.
Also, in regards to not being able to insert text before the table, it is possible to get back to the invisible line using the left arrow key while inside the table.
I just found a two-step workaround for this. This will only work for Mac users, but maybe a similar approach can work on Windows?
I exported the .enex file from Evernote, and then imported that into Bear, an Evernote competitor that only runs on macOS/iOS. Great product, but we decided to consolidate everything into Google Drive.
From Bear, I was able to ...