Hello @eric.gundam welcome to Hive! I would definitely recommend doing that if you wish to do so and check out other communities that Hive has!
It's optional but would be awesome if you do that. As a sample of what an intro post is, you can refer to this intro post for reference:
Keeping Up With the Buzz - My Introduction to the Hive Community
There's no specific format on how you do your intro post, but there is some suggested content that we would love to see in your post. Information like who are you and where you're from, how did you discover Hive or who invited you, what types of content you want to see here and the types that you want to produce, and what are your expectations in this platform. There's no pressure on this. You can choose whatever information you would like to share.
If you decided to make one, don't forget to tag @macchiata.
~ @macchiata from the @OCD and @lovesniper team