Pre-release Slack App looking for Marketing/Copywrite/UX

A friend of mine and I (both developers) are about to release our second app to Slacks app directory. The product is finished, we have a fully functional staging app, but some final touches are still missing.
We are both very bad with words and not native English speakers.

What we are looking for is a person who can help us with the texts for our landing page, web app, profile in the app directory, but also for the different app flows (welcome message, subscription flow and other basic app flows)

We would like to establish a long-term partnership here, which could also extend to future functional extensions of our app, blog entries etc. or the improvement of our first, already published, app.

Feel free to send me a direct message here or leave your contact information as a comment. I am really looking forward to work on this with someone.