Hey guys!!!!!!!!!

for some reason when I drive my cen subaru rally it takes forever to shift to 2nd speed, it wasn't like this before the car is not new and I have not taken it apart, I have read that I might need to change the shift point, just not sure if I should. I don't want to screw something up. should I and if I need to do that can anybody tell me how exaclty?

thanks guys