Parrots do best with calm energy. Excitement can leads to bites.
2 months is still a short time. You want to form a bond of trust right now.
So don't be pushy or forceful. Be calm, slow and patient.
You're bird is also still a baby and learning.
If she's not in the mood for scritching, listen to her. Try again a bit later.
Show her you are listening.
Most behavior problems arise because 'we' the people don't listen and learn the signs and body language of our birds.
A strong trusting bond will last a life time, and help make problems that arise surmountable.
Take it slow and easy.
I'd also be wary of starting shoulder time.
Birds must earn that place over the years.
Your eyes and face are too close. Babies will go through stages as they grow.
Sometimes nips and bites happen. Protect your face.