@luislua, welcome to Steemit! I use the same camera that you used in your selfie. Although the pictures come out great, as you know, they have their limitations especially zooming, closeups and at night. That's said, I'm saving up for a real camera.

A few tips. Focus on following a wide range of contributors, but don't overwhelm yourself. There is some great content and information on Steemit. I learn something new daily. A few tips, blog when you have value added or quality content, many treat this like IG, but its not. also be selective who you upvote, who you follow and provide well thought out comments/questions. Finally never ask for upvotes. Also there are many great blogs on posting, dos and don't, helpful hints, etc. Just search and you will find. Steem On!