Help for the next trip

Hi everyone and happy new year, I'm organizing a trip to Northern Norway with my wife for next March and I need some help from the more experienced. We have already purchased direct flights from Italy to Tromso (it was the only direct destination for Northern Norway) departing on March 2nd and returning on March 9th. We also already booked a car from Tromso airport for the whole week. We would like to visit Tromso, the Lofoten islands, do a couple of excursions (husky sledding and reindeer sledding) and maybe, if possible, go to Abisko one evening (which I read is one of the best places to see the Northern Lights) .

There are 8 days in total but the first and last days are air travel, so there are 6 left. How could we divide the various days? What could we visit? What are the best companies for excursions? Is it feasible to drive from Tromso to Svolvaer in one day or is it better to split the journey in two?

Thanks to everyone who wants to help us!