How exciting that you want to pursue a career in nails.
Im not going to lecture you quite yet on the fact that our chemicals are highly dangerous in the wrong hands, or that you shouldnt be using them without training; im sure you already appreciate that. And im quite sure that it wouldnt stop you using them anyway
You shouldn't mix brands because of the details given above, so I won't go over that for you again. However, I also want to make sure you know that ebay is not the place to buy pro products - you never know what you're buying. This is dangerous because you could potentially be ending your career before it even begins if you end up taking a reaction, you will never know exactly what is in the products.
While you're waiting for your training, why not approach your local nail salons and see if they need a Saturday girl. You never know where this might lead you.
Never pass up the opportunity to learn from the best of the business - many of whom, we're lucky to have right on this very site! Heed their advice, because they've been exactly where you are now and they know what it takes to succeed. Even if it is not something that you want to hear right now.
Your journey starts with putting a good grounding down with the best training you can afford.
Good luck!