Sergers are complicated -- more complicated than sewing machines. What types of edges are you wanting to finish?
How good are your eyes and eye-hand coordination? You typically have to thread 1 upper thread and 2 loopers, and the loopers can be tricky. If you don't want to have to deal with threading, then you need to buy an air-threading serger such as the Babylock Imagine.
The only "simple" serger I know of is the coverstitch serger, which creates hems like those on the bottom of t-shirts. But I don't think a coverstitch serger would be able to do rolled hems (like on napkins) or simply seam garments together (which creates a seam with covered edges). To do those, you need a regular serger. You can leave a regular serger set up to do rolled edges, but even then you would probably want to know how to re-thread it if a thread breaks.
Last edited by Prism99; 12-10-2017 at 06:00 PM.