I'll put this in bold as it's quite important
Do NOT just plunge in and start up a limited company without speaking to a qualified accountant first!
There are a couple of points about your request that worry the hell out of me...
The fact that you do not know the ins and outs of corporation tax, shareholder dividends, opening companies, submitting returns to companies house etc suggest that you must speak to someone qualified first.
Having Ltd after your company name is not the be all and end all, run incorrectly, a limited company could end up costing you more than your business is worth.