HOW to PRACTICE on the MuseScore.com website
Go to Musescore.com. Get a subscription or free trial for MuseScore Pro.
When you want to practice, come back to this website and access our set of scores for web browser.
Tips
The loop symbol (circled in pink in the screenshot below) allows you to select short sections to play repeatedly.
The +/- symbols (circled in blue) allow you to adjust the tempo.
The mixer (circled in green) may or may not work. It seems to work reliably on the iPhone app.
The space bar is an easy way to start and stop play.