Awesome, you'll love it! The eye AF is an absolute game changer with family.
The kit lens is great, which is a nice bonus. I've added a few, but have found that in my regular sling bag stays the kit lens, the basic Sony 50mm 1.8 (SEL50F18F) and the Samyang AF 35mm F2.8 FE.
Those three make a great, low cost, compact set for snapping the kids and days out. Think I paid £85 for the 50mm and £110 for the 35mm, both second hand in mint condition. They also both fully support the proper auto focus.
FYI, that all fits very nicely in the
Peak Design Everyday Sling 3L