Yeah, building a helicopter is hard, not as simple as motor here rotor there, like this
__________________main blade/rotor
| shaft
---
| | motor/engine
---__________________________(O)gyro of-set
/ \
_____/____\______landing gear
If you do it perfectly this will probably work.
If this is your first project, it'll be pretty hard.
Go with a quad-rotor like Cyberfish suggested