I made a mesh! Me! And the computer didn't explode!

Somewhere amidst the unusual snowfall in my country (shuddup, two inches during winter in unusual, we have rain, not snow) I might have lost what precious little was left of my sanity and have decided to try making a clothing mesh for the sims. The tutorials are confusing O.o I mean, one says 'NEVER DELETE VERTICES' and then the other says 'press delete to remove unwanted bladeebladeebla'. Who am I supposed to believe here? But I kept going and finished a tutorial and edited the maxis teenager mesh and now I have this in game:

( Gratuitous pic spam of one iffy dress )