I'll be arriving at Heathrow Airport Sept. 4, approximately 11:00am. I have a large checked-in luggage plus a smaller carry-on suitcase. What will be the simplest way to get to Euston Station? And will I have enough room on the train to put my luggages? This is my first time travelling to London, so I am quite at lost as to how to get from place to place. Is there a better way of getting to Liverpool? I want to keep this trip as affordable (college student here) as possible.