Howdy & welcome to the quilting board & to the world of quilting. You are going to love retirement & quilting. I don't have an answer on the serger but I would suggest (if you haven't done this already) that you stock up on fabric/supplies, etc. After retirement there will be less money coming in for you to buy, buy buy & you should get it while you can. I made the mistake of only buying as I needed fabric for a project & had very, very little "stash" when I retired. I'm regretting that now as a fixed income doesn't stretch very far.
You will find lots of help, suggestions & answers here on this friendly board.