I don't know for sure, but I believe your guitar came with 80/20's. I know my AJ60 did. And I think other MD60 owners would probably agree.
Try phosphor bronze strings. Pick your brand, but I think changing the type of string would be the best place to start. Keep using the same gauge as your try different PB brands. When you zero in on a few brands, then switch gauges.
Most of all, enjoy the ride.
As my dad always said about model railroading: don't be in such a hurry to get done. What else is there to do afterward?