Hello @lamphuong! This is @traciyork from the @ocd (Original Content Decentralized) curation team. We noticed you shared your first post here on Hive and introduced yourself to the community - congratulations and welcome!
Speaking of community, we have many different ones here on the blockchain, devoted to all kinds of interests. Here's a link so you can check them all out - Hive Communities. I think you'll find these interesting to start off with -
Also, as Hive can sometimes be quite confusing, the newly launched Newbies Guide is a growing repository of useful and easy to understand posts about how the Hive ecosystem works.
Please be aware that Hive is a bit different from other social media platforms since you are monetizing your blog, so it is important not to include content that you don't own without sources (and it shouldn't exceed 50% of the post). For more information, check this post - Why and How People Abuse and Plagiarise by hivewatchers.
In addition, since you're new, you may run into an RC (Resource Credits) error when trying to comment/post because you don't yet have enough Hive in your account yet. For assistance with a temporary delegation to get you started, be sure to check out the Gift Giver site.
I'm sure @trangbaby will continue to help you as you begin your Hive journey, but if you have any questions, feel free to hop into the OCD Discord server and we'll do our best to answer them, and again welcome to Hive!