stick with the cub .. i learned on a hanger 9 80" cub and that thing was fun ... so what if it gound loops easy ... it will teach you to work the rudder on takoff more so when you get a diffrent plane you will feel like your cheating.
aerobatics? I could do illemans, split Ss, rolls, loops, stall turns, flat spins, hammerheads, and inverted flight with my cub what more do you need to start off with (ok.. no outside loops due to the flat bottom wing)
another good thing about the cub is it will teach you to land correctly .. you dont "land" a cub .. you "let it land" if you force it.. it noses over... but if you hold it just above the ground until it settles you get great looking 3 point landings.
clipping the wing is a good idea for when you get a bit better.. it will make it react a bit more for aerobatics and such and it will land a bit faster (one problem with my cub is on landing i had to be almost stopped to touch down . it just kept gliding and gliding and gliding. Before its demise (radio failure) i was temped to put a drag chute on it just to land

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