If your friend is not a Christian, and usually isn't interested in God, and she's suddenly asking you about God...
that's a pretty big deal.
The most important thing is to realize God is working on her heart, and you need to just "be there for her", and be loving. and pray for her.
Loving her is more important than explaining complex theology.
But... you should still try to give her some kind of answer when she asks a question.
But guess what?
If YOU are the one she's coming to, with questions about God,
then be assured God has gifted you, in some way, specifically, to talk to HER about God.
that's a pretty big deal.
The most important thing is to realize God is working on her heart, and you need to just "be there for her", and be loving. and pray for her.
Loving her is more important than explaining complex theology.
But... you should still try to give her some kind of answer when she asks a question.
But guess what?
If YOU are the one she's coming to, with questions about God,
then be assured God has gifted you, in some way, specifically, to talk to HER about God.