You can use and publish them. I'm going to check the license i don't know much about the creative commons etc. if you paid for the assets you own them and can modify them. And as for support about them. Thank you for the question, i hope i helped you.
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Yes that was helpful. It sounds like what you want is Creative Commons Attribution license, but they have a tool here that helps you figure out what license you want:
https://chooser-beta.creativecommons.org/