Right after arrival
In Poland, there are some very popular among foreigners airports. These include, among others, Warsaw Chopin Airport, the port Reymont in Lodz. These ports handle most of directions and probably if you are going to visit Poland you'll land at one of them.
After arrival you should take a taxi to get to place where you want to stay during your stay in Poland. Of course, nothing stands in the way to start your tour from the first day, so you might want to ask the taxi driver about the nearest monument or a place worth visiting.
What is Taxi Services Commission? Wikipedia explains
The Taxi Services Commission (the TSC or the Commission) is the Government agency responsible for the regulation of the taxi and hire car industries in the State of Victoria, Australia. Before becoming a regulator, the Commission was responsible for conducting a major independent inquiry, the Taxi Industry Inquiry, into taxi and other small commercial passenger vehicle services.
The TSC was created as a statutory corporation by the Transport Legislation Amendment (Taxi Services Reform and Other Matters) Act 2011, which amended the State's prime transport statute, the Transport Integration Act 2010, and the Transport (Compliance and Miscellaneous) Act 1983.
What is taxicab? Wikipedia explains
A taxicab, also known as a taxi or a cab, is a type of vehicle for hire with a driver, used by a single passenger or small group of passengers, often for a non-shared ride. A taxicab conveys passengers between locations of their choice. This differs from other modes of public transport where the pick-up and drop-off locations are determined by the service provider, not by the passenger, although demand responsive transport and share taxis provide a hybrid bus/taxi mode.