Word. What he said.
Also make sure to look on the bottom of Cubase where it will say VST instruments. Pull out the Access Synth TI section out and place it near your track this way you keep things a bit more organized.
Its there in that section where you will find the filter, cutoff, etc options to automate and tweak everything. Look by the + symbol
Remember to click R and W when recording your automation. When done simply shut off W. And watch that sucker play back what you did.
Piece of cake.
Hit me up if you need help meng
Hope that helps