Heartiest congratulations
First thing is insurance
Do noting else bhai. Just top up the tank and drive. If you know some expert detailer, take your car there and get the over spray removed and get it detailed inside out.
Remove all plastics from seats and all slips and stickers on dash, meter, ac knobs.
Just put plastic mats as the black original mats will catch a lot of dust.
Buy shades and silver windshield stick on to save dashboard from sun while parking in sun.
It's normal. Drive it a bit more it will go to 9 and and then 11 km/lit after few more days