Here's my copy-paste tips comment:
 
Welcome to the community. Read the rules here. You will gain points (the number in the white square next to your username). One "Upvote" on a plane you upload brings 15 points, and an upvote on the forum post brings 2 points. Once you reach 100 points, your point field (currently white) will turn bronze, at 1000 points silver, at 5000 gold, and black (we call it platinum) at 25000 points. To tag a person in the comment, put "@" in front of their username, or hit the "Reply" button on their comment (ex: @RANDOM2000). This will send notification to the person you mentioned.
 
Don't spam low quality planes. If it doesn't fly (or do whatever it's supposed to do), don't upload it. Put effort into every build. There are many tricks ingame tutorial won't show you. You can learn them by taking apart planes already uploaded to the site. If you don't understand how something works, feel free to ask. You are also not restricted to planes. People have made ships, tanks, cars, trucks, trains, dragons, spaceships...
 
Be sure to respect other users. Swearing, insulting other users, discriminating, or posting sexually suggestive material can get you banned. Users with red point boxes are moderators. If you have a problem with anyone, talk to them. If you have a problem with building, talk to one of the users whose builds you like. The more experienced they are, bigger the chance they can help you. If you have a problem with the game itself, seek users with blue point boxes. They are developers of the game, and they will take note of the problem you are having and probably fix it in the next update.
 
I wish you a happy stay in the SimplePlanes community, and a lot of points.

I suggest using fuselage blocks instead of cubes. It'll let you make smoother shapes.