I too was in the same place as you not too long ago - I dont know where you are doing your training at but for me it was the Arizona desert. Turbulence and heat were a nasty combination, and you're absolutely right it can get scary at times.
When things start flying around the cabin in a Cessna, your head is hitting the roof, and you have to request block altitudes thats no fun for anyone (even experienced pilots). What I'm trying to say is that you really shouldn't be too put off by this, its normal to be disturbed by turbulence.
When you get to the regional/major level I think you'll find that very rarely do you ever have to 'just deal with it'. Most of the time we find smoother conditions, and as the other posters pointed out the bumps in general are much less aggrivating in larger aircraft.