You will need to do a lot but the main thing is to accept that the closing date can be aspirational at times, and for various reasons often can get pushed back through no fault of anyone. This means you should be careful about making commitments to delivery companies, landlords or cousins in America until we are almost sure the closing will happen on the appointed day, and even then it happens that issues can crop up.
You will need to organise an engineer to look at the property, sort out the financials, insurance policies, and all the other practical things. We will help you with the rest.