the way i see it is that you have only been riding for 2 months, Climbing neatly is something that takes time.
I suggest trying 2 things,
find a not too steep, consistent road/dirt hill that is close to home that you are going to come very familiar with, then,
try to find something long i.e. 300m, 500m 1km,
1. put your bike in a fairly easy gear and spin up it without changing gear, try not to use your granny gear for this and pedal up the hill remaining seated. do this 10 times
2. put your bike in a fairly hard gear and see how many times you can climb before standing, then finish your set of 10 with a bit of standing.
staning/stomping on your pedals helps abit as you are using more body weight than muscle to keep the cranks turning over.
they are my thoughts and they could be totally wrong.
also when climbing you want your chin to be over your stem bolts as this will keep you stable especailly when seated climbing.