How to keep messages from previewing on my Apple Watch screen?

How do I keep messages from previewing on my Series 7 watch? I have it set on my phone but people can easily look at my wrist and see texts I receive. I want it to only notify me that I received a message from someone not open the message. This glitch makes me want to toss my Apple watch I send and receive texts quite often and don't need my personal text messages opening while with clients.

[Re-Titled by Moderator]