Docking

Docking is, perhaps, one of the hardest endevaours to do in any "rocket game." If you do not want to watch 30 minute videos, and have an in depth tutorial, here's the basics.

Begin by launching a craft with a docking port, preferably on the ends of the module / thing. We'll call this craft "T" for Target.

Now get another craft, and wait until "T" is about over the launchpad, then launch (in the same direction you launched T, like say you launched T west, go west.)

(Keep RCS off, you need the mono! Also preferably have a good gyroscope for faster turning.)

Remember, if you are lagging behind the craft in the orbit, burn to counter. Also do this if you are far ahead of the craft.
Next, get to a close approach, where you have a clear visual of the target. (1km or so)
Remember: if lagging behind burn to counter it, and if far burn to counter it. Cancel the velocity, so you're completely still. (Not heading or moving away from "T.") You may still be moving away/toward (directly away/to) "T," so use the retrograde/prograde (while t is targeted) to counter these. Be precise with these short burns. Finally, burn directly towards T.
Select T as the target, and turn to it. Docking port should face T.
Control T, and select the other craft that will dock with T. Target it and point at it.
Finally, turn RCS on. Slowly and carefully move forward, and finally satisfingly dock.

Remember to keep in orbit (at least 60km periapsis.)
And very helpful, target the craft and turn to "target" speed. When at your approach, burn to set this speed to 0, then burn to the craft you want.