How to import opportunities based on product and time periods sold

How to import opportunities based on product and time periods sold

Right now, all of my customer data is in Excel but I would like to import it to this CRM system.

I rent exhibits to other museums and record the museum's contact information as well as the exhibit or exhibits they are interested in. Sometimes, a museum will book an exhibit immediately, and then book another several years later so this is a very long-term relationship and I need to be able to manage several different products at once for the same customer. I also need to be able to generate a list based on the product of interest so that I can target certain customers when I have a spot that I am looking to fill - that's another detail - not only am I selling an exhibit, but I'm selling spots on the exhibit tour.

Can anyone recommend how I would need to set up my Excel sheet to import all of the data on exhibits/products of interest and time periods available?

Thank you!!