Jack of all trades, master of none - how to sell myself?

I've been job hunting for a while with no success. I feel like I have no real skills - I have a Master's degree in natural science, but hate it completely and would like to find a job in a different field. I have some language skills, but not proficient, I went through some IT courses so I'm familiar with a few languages, but not to the point I'd be able to build something fancy on my own.

How can I sell it as an advantage? I did try a lot of things and I am quite quick to learn. Only the deep knowledge is lacking...

Thank you.

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