ok I signed up to get scuba certified, but I have trouble swimming to the bottom of a 12ft pool without my head hurting from the pressure… will I be able to do 35ft?! does the scuba equipment help alot with this?

Your head hurts because of the increase in pressure (weight of the water) as you descend. This is normal.
When you SCUBA dive you will be taught to deal with this by "equalising" your air spaces in your head (ears and sinuses). This should mean no pain.
You will find that you have done this previously on an aeroplane (though the pressure is less) while it descends to land.

Try it the next time in the pool. As you descend, pinch the end of your nose and blow GENTLY against it. Try it now, you will feel your eardrums move!