Puska, at the risk of being flamed for negativity, you really, really don't have a clue about the difficulty of what you propose, and how impossible your plan and time scale are.
I am at a loss to tell you what to do, beyond spending a couple of weeks going over the forums
here on CF. Questions like yours have been discussed ad nauseum, and there has been heaps of advice given folks like you... some good,some bad, but that's the internet!
My take: you have no boat, no sailing skills whatsoever, no knowledge of the task that you envision undertaking in a few weeks. this is a no-goer if I ever encountered one.
I'm sorry to be so downer, but for those of us who have taken the time and effort and yes, money
, to address those issues and a heap of others, the idea that one can just up and do one of the more difficult cruising passages is ludicrous.
Please don't hate me... the truth often hurts.