Playing people in given rating range in blitz

You can edit your rating range. Go to Settings->Live Chess-> and change your incoming and outgoing rating range. Good luck with your chess

You can also create a Custom Challenge that lets you set your range.

Thanks Lee and Martin. I do not have these options - maybe they are for paid accounts only? (happy to pay of course!)

I have got the answer from Chess.com's help service: this setting is only available from the web interface, not in the Android app. I have requested that this very useful setting be added to the app.