Hecate

But if i give her offerings at a crossroads what happend if someone steal my offering?

Hecate would know how to deal with the stuff offered. Sometimes things can be good not only for you-Hecate, you give her an offering (honey, food, etc), and she makes possible to someone or even an animal to take the offering and eat that. If someone is doing anything bad about the offering, so, she has powerful enough to take decisions under that person and the consequences are between they alone.

Your work ends after you gave offering.. It's nothing your business what happen after you gave offering.. Still if you worry Best thing to do is Give edible offerings to animals or bury them or maybe in a running water.. For non edible and non-decomposable offerings, simply bury them or just leave where they are on the cross road..
Blessed Be..

Burning offrings works too..
Just say
I offer ..... To ...... Through this sacred fire.. And you'll be good..

What help can hecate give me. I need good luck, job, money etc. Can hecate help me?

With a true heart,she can give you all in the realm of reality with the eyes of justice. But she give gifts and bestow with abundance,to her true devotes.If you try to think you can use her,Surely you are doing pretty mistake.lol
Blessed Be.

These explanations are very accurate and have also enriched me.

These explanations are very accurate and have also enriched me.

You can make an offering. I personally would offer meat and honey.

To a user above me-Hecate is not the Queen of Hell. Sure, she's the Goddess of Witches, but I don't think she's the Queen of Hell. No sources I've found depict her as a Queen of Hell or any other place that would fit that description. She isn't even the Queen of the Underworld, which is different from Hell too. So there's no real reason to think of her as a Hell Queen