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you can just drag and drop pictures from your computer right into the window where you type your post, you can also paste in a link to an image that is on the web.
You dont need permissions or passwords to post an image.
You can find your 'posting,owner, active and memo' keys from your wallet page by clicking on 'permissions' and follow instructions from there. welcome to Steemit.

Hey! We met in the hostel in Lisbon. I told you about Steemit.

Welcome to the platform.

Here are some things that will be helpful.

I suggest you read https://www.steemithelp.net especially the part about [etiquette](suggest you read [Steemit etiquette](https://www.steemithelp(https://steemit.com/faq.html)

I'll do a post about you and transfer the rewards my post makes to you. My way of saying congratulations.

I noticed you used the wrong tag and misspelled it in this intro post.
The tag should be
introduceyourself

Hey, thanks for the informations and the upvotes and all :) ... i just started a contest like american idol (Steemit Superstar), you told me in lisbon there was someone who did this but he quit

Regards Feli ;)