Need help on choosing design pattern

Sorry for the question but I am new to using design patterns and I need to write a project ( I don't want someone to write it for me ), however I am finding it difficult deciding which design pattern would fit best. The task is: Make a project which returns information about invested funds in a stock exchange. This data is not readily available to everyone but first the customer has to identify if he/she is an investor,specialist,agent,mediator. Also the customer has to have at least 100k$ initial capital. If the customer is logged return all information in regards to funds, stocks invested, price of stocks etc.

Would really appreciate any help. (It doesn't need to be a difficult project,pretty much a console app would do for the requirements of the project)