Welcome and HAPPY to see you on Steemit.

I made some mistake on my introduction, then I read this articles and help me to improve... always good to know...

Here are some examples:
https://steemit.com/trending/introduceyourself

One of my mistake... jajaja...
Make sure your first tag is:
introduceyourself

There are no official rules for participating on Steemit.com, but one of the users @thecryptofiend has created an Etiquette Guide for the community.

Many users also like to post a photo or a video which shows them holding up a sheet of paper with the current date and their Steem account name handwritten on it. This is a great way to add a personal touch to verifying and introducingyourself.

Here are some things you'll find helpful on your journey through the Steem-O-Sphere.

The Welcome Page

The Frequently Asked Questions

and SteemitHelp.net