Kylaq Signature AT - Hill Hold Assist Doubt

I am planning to buy Kylaq Signature AT but it does not have Hill Hold Assist feature.

What would happen as I release the break on a slope? Would it go backwards, Or would it start crawling ahead? Or does it depend on the inclination of the slope?

I am confused as I am a new driver, and the showroom does not have a Signature AT variant for a test drive.