You've done well. I have tried the accepted method - transfer the shape to a board by drawing it out - if its a square, draw a square and then where you want bends, the corners on a square, hammer in a panel pin. Baiscally whatever shape you need, draw it and put a panel pin wherever there is a bend.
Then use that to bend your wires around. Sounds simple but I have never yet in years of doing this, managed to get in the case of railings, get three or even two exactly the same! There is always some slight difference on the corners so that it is noticeable on the finished item.