You got it down in one piece, that's the main thing. Your flight was a lot like my first successful flight with my little electric one. I now take off with a little down trim, let it develop plenty of speed keeping it straight with rudder then let it lift off and keep the nose from rising too much then back off the throttle a little when I get at least 75 feet altitude. It always amazes me how much less thrust is needed to maintain altitude once you get some altitude and get it trimmed for level flight. My advice for landings ..there is a lot of drag so leave a fair amount of power on, level wings with rudder, land on the mains and reduce power until the tail settles keeping it straight with rudder. ( land it like a P51)
Much continued good luck.
