C3. I want to rendezvous with the ISS, but I can't even get close.

The first step for a successful rendezvous manoeuvre takes place before launch. You should launch into an orbit with as little inclination to the orbital plane of the target as possible. This means waiting until the orbital plane of the target passes through your launch site (use the Map MFD to monitor this). By launching at the right time and into the right direction, you can minimise the need for later corrections of the orbital plane (once in orbit, you can use the "Align orbital plane" MFD for eliminating any residual inclination).
The next step is to catch up with your target, by modifying your orbit appropriately. Use the "Sync Orbit" MFD for this.