While you can setup a second profile to put the Google services into, I don't recommend it.
The version of Google Services on GrapheneOS thinks it has root, but it does not.
So there's no dramatic need to setup a second profile, unless you want it for other reasons.
I personally think the second profile feature is one of the things people think they want/need from GrapheneOS, but really are happier without.
(Sure it's safer, but GrapheneOS is already so much better than other mobile OSes - and I hate to see someone quit GrapheneOS just because they didn't like the optional profiles.)
An exception I have seen is for apps mandated for a job. I'm happy to bury that stuff deep.
If you want my advice, talk to them constantly as if you are the narrator, and smile and make eye contact at every opportunity.
This is great advice.
I've always done this, and my kids all started talking surprisingly early.
But my motive is just that it calms them.
Some baby fussiness comes from insecurity, and I find that a running narration makes them more relaxed about being set down and returned to - that kind of thing.
Basically they get the same comfort from my narration as I get from leaving the TV running when I'm alone in the house.
I don't know (or worry about) if it really makes any serious long term difference - but it was occasionally convenient as heck when they could tell me what they wanted a bit earlier than I (or anyone) expected them to.
With my last kid, I felt more brave and also mixed in some singing, and think they are more musically inclined because of it.
I keep expecting Jeff Bezos to get angry at the portrayal of Lex Luthor to top it off.