One day in Kuala Lumpur

Howdy folks,

I'm travelling to India from Australia and have booked a flight with a 16 Hour layover in your fine city.

I arrive around 6am so my plan is to grab the KL Sentral (is it necessary to book in advance or am I fine grabbing a ticket when I arrive?) straight into the city so I can see some sights and eat some food before heading back to the airport.

I've already noted the Islamic Arts Museum, the Petaling Street Market, and a couple other tourist attractions in that area. Obviously I'll be on a tight timer to get back to the airport (Carry-on only so not the longest wait) but wanted to see if anyone had any other suggestions for things to see or especially places to eat while I'm in the area.

This layover visit is definitely a bit of a whim, so if anyone has a big detail about Malaysia I should know that some cursory googling didn't reveal to me, that would be great as well haha

Thanks so much!