Hello and welcome to the board :D:D:D
Quilting thread is typically waxed coated and should not be used in the machine. It will leave a waxy mess :wink:
No such thing as a dumb question, though, we all have questions no matter how long/short a time we have been quilting :D:D:D
Maybe a Warm Wishes pattern? It would show off your florals nicely :D:D:D