Can I Get a Stitch Guide for This?

The Needlepointer has a nice article up about stitch guides and what to do when the answer to "Can I get a stitch guide for that?" is no.

https://www.theneedlepointer.com/can-i-get-a-stitch-guide-for-this/

"Be brave" and "use doodle canvases" are the best pieces of advice!  But if you need a little more hand-holding than that and don't have a shop or fellow stitchers to talk to about your canvas, check the "Learn to Embellish a Painted Canvas" articles in the tabs above.  In those I do my best to help you get started.  

Needlepoint For Fun's Guide to Writing Your Own Stitch Guides

It's brief but encouraging and full of good ideas about how to get started creating your own stitch guide.
http://www.needlepoint-for-fun.com/planning-a-needlepoint-canvas.htm