A week is good - don't bother testing until you've disolved at least 1-1/4 lbs. Total of 1-1/2 lbs. should get your pool to about 35ppm CYA and 2 lbs. to about 50ppm CYA. As Watermom always reminds: give the sock a squeeze now and again to help it disolve. Shock level for your pool with little CYA is 10ppm FC according to Ben's Best Guess Chart; when most of your CYA is disolved, it'll be 12ppm FC.

Your call on the salt - FWIW I think managing your pool with bleach for a while will give you a better idea how it reacts and make you transition to SWCG easier.