Courage

My great-grandma might die soon. She lived a very long life, but she hasn't put her faith in Jesus. I am a new child of God so I haven't been able tell her about Him. I really want to do that or else I'll feel so guilty. But as someone who's been shy her whole life and has a past in anxiety, I'm afraid to do so. I obviously want her to get into heaven but I don't know and I'm scared what I'd say, how I'd do it in front of orhers and stuff like that. I know what's the right thing, I just need courage. Also I'm14.