FYI
After Sept. 18, you’ll no longer be able to send or receive direct messages on YouTube as we focus our efforts on public convo tools (comments, posts, etc).
You can still share what you’re watching w/ others via the Share icon below videos.
More→ https://yt.be/help/9Hns
We'd recommend you to look at your AdSense Payment report instead. Note: finalized earnings aren't transferred to AdSense until about halfway through the following month: https://yt.be/help/VKkS