For best first time acrobat?
get the lightest -with the shortest wing to overall fuselage length
or simply build as light as possible -then saw off the wing tips .
really -
the EDGE actually is one of the easiest to stall the wing -due to the straight line LE.
BUT it is also one of the longest fuselage moment arm designs (actual CG to horizontal tailplane
Personally I don't like em (scale EDGES)
But - take an EDGE and shorten the wing -making it simply a short squared planform (a rectangle ) and you have an excellent aerobatic setup- it will stall cleanly - will roll like a pencil and you can 3D it till hell freezes over -and keep the airoil as thin as possible.

The "Why" is in the wide stubby wing
A - it has all of it's drag/lift in close - so any tail group control is far more effective
B - the short wide wing mushs easily at very low speeds and the airflow is outbound -which stabilizes and reduces what some call "tip stall".
C-the RN increases with the wider chord-far more effective in lift - at speed.
D- the frontal drag is less.
and
E - ifyou don't believe this - build a foamie from flat foam and try the various planforms.
or look at the best fun flyers - ALL short wide chord wings.
Is there any full scale design fitting IMAC rules that fit this layout?
yes - there are many homebuilts which fit nicely and some actually have entered full scale IAC competition. they are not well known because the full scale ones have tiny engines and don't do as well as the power setups.
The reason the bipes do well i because essentially they ARE this setup -
My new model will be a Cassut- 1920 sq in - ZDZ100 80" span - under 20 lbs.
according to my lil test models -it should work .