Yeah, your post shows up in introduceyourself category, no problem with that :) I think you should investigate DTube more, especially if you are going to publish more videos/songs :-) You'll find more infos:
https://steemit.com/video/@heimindanger/introducing-dtube-a-decentralized-video-platform-using-steem-and-ipfs

As for your beginnings here, I strongly encourage you to find other people according your tastes/interests/hobbies and follow them and comment (judiciously) as much as possible, which will bring you the best payouts options. Bear in mind that:

How is the reward pool split between authors and curators?

Up to 25% of a post's payout is awarded to curators (the people who upvoted the post) as a reward for discovering the content. The other 75% is awarded to the author. If curators vote for a post within the first 30 minutes of it being created, a portion of their curation reward is added to the author payout. This portion is linear to the age of the post between 0 and 30 minutes. As an example: upvoting at 15 minutes will donate half of your potential curation reward to the author.

And well... You'll figure it out... Didn't understand much of it as well when I began! haha I'm sure you'll be successfull here in no time!