I used a Lee Loader for years to reload my .303 British. Follow the instructions, use the powders named and be very aware of the warnings and you'll be fine.
And welcome to the reloading addiction.
NRA Chief Range Safety Officer, Home Firearms Safety, Pistol and Rifle Instructor
"There are three classes of people: those who see, those who see when they are shown, those who do not see."
Leonardo da Vinci