Buildable vehicles?

I am currently developing a small game project on my own. A major part of the game will involve using primitives to build your own avatar. Being extremely new to UE4 (my first day!), I have absolutely no clue how to get this to work… let alone model. Can you direct me to any tutorials that can help me get this project going?

What kind of avatar are you thinking of?

UE4 has a couple of primitives already in the starter pack, and this free pack has some more: Purpleprint - Kit by Hevedy

The “avatar” would be a flying vehicle. It could be anything from a jet fighter to a UFO.