Hi,
Have been through all of that quite recently.
Do one step at a time.
Post your questions here and I can respond quite quickly (I struggle to find stuff in fb)- am sure others will respond as well.
Is your first qn - how do you get your sequences to the PI ?
If so , use the file manager , browse to your xl show directory and upload the Yoursequence.fseq and the mp3 . (the xml is not required)
Then on the content tab , create a playlist and add the fseq (and the mp3) as the first item,
(Optionally )Test using the Display testing tab , that the fseq runs ,
Then test running the playlist from the status page.
Add another fseq/mp3 to the playlist etc
Note: Connect your PC/laptop to the Ethernet port of the PI via a switch/router (I did not try without that) if possible to upload your sequences as it would be faster.