I like LMMS too. I've made dozens of tracks.
Here's one I made with stock drum samples and basic synths.
https://sanderson.band/2023/07/24/e-sandy-song-1/

When you click on an empty Beat/Bassline track, it automatically makes a section of b/b the same size as the set b/b, but you can resize it to the right and make it longer or shorter. Why not to the left? This would be great, because I want to add just the last part of a beat to part of my song, but...