Thinking about starting a business myself since getting redundancy some months ago and feet starting to itch. I was advised to check out the different support agencies, do a lot of market research and get a good business plan with detailed cash flow projections together. I don't know where you are based, but, check out the Fingal Enterprise Centre website. This is one link, to a 10 week start-up biz course, that may be of use... [broken link removed] There are similar enterprise centres around the country.
A lot of cafés, newsagents and other small business start up and then close up. Don't let this put you off. Good ideas, good planning, hard work, healthy cashflow, location and a bit of luck work wonders. You are also entering a very competitive sector what with Insomnia, Café Kylemore, Starbucks etc., but this can work to your advantage too. As an almost daily café user there is room for good independents e.g. Brewbakers on South Frederick Street. The big lure is good consistent coffee, friendly staff and value for money snacks and food.
The inconsistency across franchised branches drives me crazy e.g. Insomnia in the Pavillions at Swords can be great and then the same coffee in another branch the next day can be poorer quality. It's usually a training issue... e.g. observe how they actually make Americanos in different branches. I have visited Seattle, the home of coffee culture, on a number of occasions and have been amazed how small independent shops thrive alongside the big branded outlets..... customer service and individuality is key.
Best of luck.