Placement of subwoofers

Hi All. I would appreciate your views as to the placement of subwoofers in my system. I attach 2 pictures of my room for your reference below:-

https://drive.google.com/file/d/18w78TPuX5b9NnpA0msXvWH5Pt1ytL0NF/view?usp=sharing

https://drive.google.com/file/d/1zo9AMKBQ07HHJHxbAPcAaB8s_NCtK6Fz/view?usp=sharing

Based on the reading that I have done, I understand that the subwoofers should be placed alongside / parallel to the main speakers, and not behind them. If this is so, should the subwoofers be on the inside or outside of the main speakers? Right now they are positioned on the outside of my main speakers, but they are behind them by 1 to 2 feet. I feel that this is a system weakness and have been contemplating relocating my subwoofers as a result. 

Also, my subwoofers are placed very close to other bulky furniture, which leads me to wonder as to the effect on the sound emanating from the subwoofers. Will this effect or otherwise block the sound from my subwoofers? 

FYI due to the WAF, I unfortunately have limited choices in the placement of my subwoofers. 

Any input would be welcome.

Thanks!