As long as it doesn't have a second seat or more than 5 gallons of fuel, getting ramped isn't likely. I've only flown a Firestar once but it flew much like my Ultrastar. J-3 experience is definitely helpful, though the FS is even lighter and will get blown around more.
The big difference is the flare, if you try to flare it like a Cub you'll run out of energy, stall, and pancake it in. A plane like a Kolb, at least at first, needs to be flown down to about six inches, then allowed to settle. The Kolbs have a relatively sharp leading edge so stalls, while benign, don't give much warning and the aircraft's mass is so low that it slows up quite quickly.
The FS will be more responsive than the Cub, particularly in roll.
You also have to be ready for pitch changes with power, with the engine up high. No big deal once you get used to and anticipate it, just be ready for it and play around up high before that first landing.