My First World Builds

OK, please realize I didn't know anything and was a total newbie when I played on this world!  Don't expect much here, although they do get better in the next one.

Links to Videos:

I have to just say that I think a lot of these people who post tutorial videos are just fantastic!  So helpful!  You can go to YouTube and type in just about anything you'd like to try and build and you will get loads of suggestions, usually!  I get a lot of my inspiration (if you want to call it that) from them - so a big THANK YOU! to all the YouTubers out there that provide it for the rest of us!
 * I just wanted to say that I have since found out that you have to be careful that the person whose video you are watching is using the same version of Minecraft you are or it may not work in your version.  Some of them will tell you right at the beginning what versions it works in, and others will have it in the title, but some don't say one way or the other.  I starred this particular one because it never worked in my world, although the red stone part worked.  The mechanic with the water was what didn't work.  I'm thinking maybe if you use dispensers instead of the trap doors, it might work.  Not sure though.