I usually just use blockland's spellcheck
I usually don't fail at spelling. :P
Here is my tip to you OP.
Look through the old threads of the gallery. Look at builds there that you like, and try to recreate them. If there is a save to go along with it, then first recreate it, then check your recreation with the original. After doing this several times, you will begin to learn some semi-basic/advanced techniques used by the good builders - ie, lack of spam, good color pairing, symmetry where it is needed, cleanliness, etc. After you get to this point, look at some of the suggestions and requests boards requesting things built - they don't have the be recent, the point in doing this is to get experience in creating your own builds from your imagination. After you have mastered this, go into the gallery again or the general discussion boards and look at what people have made - look for the longer threads with more positive comments. Use these threads as your opponents. Create the same exact thing that others are making, and strive to rival them. Don't copy their specific plans/ideas, but instead put a positive, creative, original spin on your build. Focus on the bad parts of others' builds, then compare them to your builds. If you see something in your build you don't like, change it. Still don't like it, change it again. Change it until you love it.
That's how I came to be an advance builder and eventer, by following those exact steps. The only issue with it is that you may develop accute OCD, from the repetitive recorrecting of you mess-ups.
Happy building.