I am new to the road bike thing. (was a runner but lost all the cartledge in on of my knees!)

Just bought a used trek 2300 with simano ultegra components................

trying to tune up the bike (i firmly believe to do it right do it yourself!) and having the following problems..

I have a double crankset with a 9 speed sprocket.............

When I am (forgive me I dont know the correct terms here!) on the small crank up front and either of the two lowest cranks on the back my chain rubs up against the side of the front big crankset.

My rear tire seems to be aligned correctly and I just cant figure out how to properly adjust this.

Any suggestions or tips?