I'm thinking of starting a business?

It really depends on how much capital you have to invest in this business. At the moment it is extrememly hard to get financial backing...beleive me im trying to get some at the moment and im 41 so at your age its going to be harder. Try something easy to start with and a good way to start online trading is by selling on ebay for a profit. Theres many things that sell there. My hobby is lockpicking and some locks go for a fair few quid. You'd be amazed what people will buy if they think its a good price.