interior of the ki100 otsu?

Hello, I'd like to start the hasegawa kit after I'm done with my ural but I'm unsure about the interior color for the no 33 option , apparently the interior color for ki 61 and 100 is a bit messy with a lot of variation depending on who you ask.
Thanks for your answers, I use the aviation of japan blog for the exterior color of 33.

could this work?

sometimes, I see ki 100 cockpit having the same color as the fuselage.

As memo serves since the 1943, the IJAAF ordered the factories to paint their aircraft cockpits, and other internal areas, in the "Yellow Green" paint. Additionally there were two yellow green paint standards, the Ki Midori Iro no.29 (Yellow Green nr.29) and the no.7 Ohryoku Nana Go Shoku (Yellow Green nr.7). Due to some misinterpretation of this order, the factories, including Kawasaki, started to use the no.29, which was fairly similar to US Interior Green but it seems of more yellowish tinge and than later the No.7 which was much darker and close to US OD approximately FS 34088. The no.7 was also standard IJAAF paint for top surfaces camouflage that was used for the Ki-100.

also wondering if I can't take the ak set too

IMHO , yes you can.