Everyone here has provided you with great advice. I would like to add one thing. If you get stuck on any part, come to RCU and post your question. Put it in the correct forum so that you get better response, but do not move ahead if you are confused. It is much harder to go back and correct something than to get it right in the first place. Also do searches on this website for your plane, and read many of the threads. It is quite possible that your question has come up before.
For a building board that needs to be moved, here is what I did: I went Lowes (or similar store) and asked the guy in the door department if he had any damaged doors that I could buy. He had a bifold door that he sold me for $16.00... I took 1/2 of the door to use as my board. It is 18"X72" and is moveable. I then bought 3M spray adhesive, and 2 ceiling tiles, both for about $12.00 total. I sprayed the ceiling tiles on the decorative side and also the door side that I chose to use. Then I positioned the tiles on the door and cut off any overhang. I then put a handle on the end of the door so I would have something to use to hang in on a wall. If I have to move it at any time, I am able to do so without disturbing the parts that I have attached with 'T' pins. You can even stand it it up against a wall if need be. I know if I were using the dining room table in my house, I wouldn't be able to leave stuff on there for very long.