Help needed with 7.1 speaker placement for dolby atmos / dts-x

Hello guys,
I am moving to a new flat, therefore I would like to ask your opinion about how to place the speakers for a good home cinema setup, but for listening to music as well.
I already have the equipment, even if it's not the best for a Dolby Atmos , DTS:X setup, it's already given.
So here's the equipment:
- Main receiver is Marantz SR5011, capable of Dolby Atmos / DTS:X

The speakers:

Front Left, Right:
Wharfedale Diamond 230

Center:
Wharfedale - Crystal 4.C

Surround left and right:
Wharfedale Diamond 210

Side left and Right:
Magnat Monitor Supreme 102

Subwoofer:
Yamaha Yamaha YST-SW012

I've included the plan of the room in the attachement.
There are some restrictions regading the placement of the speakers. As you can see, on the left side there is a door to the balcony so side speaker placement can be only above it. Maybe placed to face downwards ? Would that be a solution ?
I want to avoid placing the speakers on floor stands, so all (Except the front left , right and woofer) will be wall-mounted.
Also, on the right side, there will be a furniture, so I would mount the right speaker also at the same level as on the left side.
The rear speakers can be mounted 50cm above ear level on the wall.

On the wall where the tv sits I will also project using an LGPA70g.
This wall will be the multimedia corner where all the audio equipment will sit. The furniture will go up to 1m height.
I am planning to place the front left and right speakers in the corners.

What do you guys think ? Any contructive suggestion is welcome.
And thanks for your help