Still less efficient than Asparagus staging though it does have the advantage of being a tad more stable though.
Asparagus staging works by attaching the outer fuel tanks to the next closest tank inner tank by fuel lines. For example you have a 3 stage launcher, stage 1 would be the outer most tanks, they would be attached by fuel lines to the Stage 2 fuel tanks and these in turn would be attached to the Stage 3 tanks (centre most) by fuel lines.
You fire all the stage engines at the start and then as the fuel tanks run out you detach the stages leaving you with full fuel tanks at each stage start.
Here's a quick video of my Project Unity launch
https://www.youtube.com/watch?v=T5oXOgzxwRU
It shows the Stage 3 separation, if you look at the fuel loads left in the left hand column you'll see as Stage 3 detaches the fuel loads go from almost empty to suddenly full.
The payload on that flight was around 150tons if I remember correctly.
Oh and to prove that even if you think you know what you are doing here's a video of me testing the launcher prior to launch and it goes, badly wrong
https://www.youtube.com/watch?v=bCvmus51e8M
Staging is simple enough in the VAB the staging is located on the right hand side, you can select these icons and then move them around as well as create and remove stages from your launcher. For the most part KSP does stage stuff for you quite well but when you get on to more complex stuff you will need to check and test launchers to get the staging right.
Finally a quick video showing how to do encounters (this is basically setting your vehicle up so that it's orbit will bring it in to a position that allows it meet another object in orbit knowing how to do this is vital to reaching other moons, planets as well as building space stations, refuelling in flight, pretty much everything and the principles in the video are pretty much the same for all encounters), the video should help a little bit but really needs an explanation to make it clearer. I'll happily give you one when you reach a point where you are ready to do orbital encounters.
https://www.youtube.com/watch?v=BVjwIdCC3SM
My final tip would be to learn how to do everything yourself (by all means ask for tips, watch videos, read tutorials but their is also a host of tools and mods that can do everything for you; launch , reach orbit, encounters, landings and dockings, all done automatically for you. I used a few of these in my early days and it hampered me. I learned so so much more when I got rid of these tools and in turn it greatly helped with my understanding of how to build and manage the space craft.