Here's your chance to apply what you've learned. Below is a simple piece for piano. Try your hand at entering this into MuseScore!

Feel free to ask questions, and answer them if you can. Also, if you'd like feedback on your own version of this piece, probably the best way to go about it is to use the "Save Online" feature of MuseScore (see https://school.masteringmusescore.com/courses/complete/lectures/6238070) and then paste the link into a comment here. You can also add your score to the group I created:

https://musescore.com/groups/mastering-musescore-course

To do this, first upload it, then on the page for the score, click the "..." menu and choose "Add to group", then select the group.

For this exercise, you will need to use what you have learned about entering notes, rests, accidentals, ties, tuplets, multiple voices, and grace notes. To really do a full job of it, you will also need to learn about ornaments (the trill symbol) and repeats, both of which are covered in later lessons.