I would really encourage you to put off starting a tea business before you've spent a year or two reading about tea, sampling different teas, and visiting different tea businesses and talking to their owners and employees.
I've been working in tea for over two years now, through running my interactive website, mainly, and I was seriously into sampling high-quality loose-leaf teas for maybe about six months leading up to that. I've been moderately interested in tea though for years before that...and I have a background in herbs, gardening, and other related areas.
I see a lot of people get into the tea industry who don't really know as much about tea as I do, and I think that's pretty risky, because I'm not an expert and I started my websites as a side project, and, as much as I love tea, it is not my life passion or life focus or interest. I see people making basic business mistakes too...the biggest mistake I see people make is working full-time on a brick-and-mortar business (without a side job or main source of income) but not having enough savings to keep the business open for the initial 1-2 years where you're virtually guaranteed to not be profitable. There was a cute tea room, for example, in Newark, DE, which hardly stayed open 6 months...you can't do that. Businesses often don't make money in the first couple years...you have to have a big cash reserve. If you don't have it in your savings, or can't secure the loan to get it, then don't go into business yet.
Also, there are some things that you really can only realize for yourself. You'll see that some businesses do things really well, and others just don't. I'm no tea guru, but if I had to start a tea business tomorrow, I'd know how to carry a broad selection of high-quality teas and I'd know how to obtain them very cheaply so I could sell them at a price that was affordable to my customers, and yet making a healthy profit. If you aren't confident with that, then it's not time to start thinking about starting a tea business. Figure out tea first, and figure out business too. Then when you feel confident, start thinking seriously about starting something.