RE: What is a good first 3d rc plane
skip the micro stuff, they dont fly that well and are not suitable for learning 3D
You need to decide if electric or nitro would be your power choice.
If money is not a problem then it does not matter, but its best to pick a power plant that can easily transfer into other aircraft that you may like.
I'd get an electric that uses the common and readily available/cheap 2200mah 3S lithium, this battery is widely used in many good airframes from foam to balsa and helicopters.
If going nitro a good bearing .46 to .55 or bigger is desirable.
4 strokes are often preffered as they have a lower available power curve and torque.
.72 to .91 are common mid size motors in 4 stroke nitro.