Hi
Fews years ago I got some litecoin and I have back up my wallet.dat, I dont remember the name of the wallet, qt? Core? (Or maybe another one?) So today if I install the official one, the core and put the new wallet.dat, it will work?
About the step:
Just download it, synchronize it, close it, put the old wallet.dat, open it again and voila?
Yes that will be voila