Welcome to Steemit. Some advices for starters:

-In Steemit the most valued content is the original content. If you decide to start doing original content, you may be interested at verifying your identity in one of the original content services availables, for example https://discord.gg/sP7YHdU

-Uploading not original content is only allowed by providing a direct link for that content. For example, https://www.pornhub.com/ is not a valid source, https://www.pornhub.com/view_video.php?viewkey=ph5c5b6c29e4b0c is

-The nsfw tag is mandatory for nude content.