You can get an aerial which clamps onto the gutter, then run the aerial lead down past the door seal and into the car.
The CB unit needs to be where you can easily use it and to the right of the steering column where the fog light switch bracket goes is good. Move the foglight switch bracket somewhere else. Hang the microphone where you can easily reach it when driving.
is it legal then to drive when using a cb. thought everything now has to be hands free,
Yes it is legal to drive using a CB, or walkie talkie etc.
No it isn't the legislation only covers mobile phones, however if you were to have an accident or be stopped you could be prosecuted for driving without due care or a more serious offence. No different to changing the channel on your radio or drinking a cup of coffee.