Sure go for it. Did you compute how many bags you'll need? You can use solar salt instead of "pool salt". Pool salt is finer ground. Remember your pool isn't at 0 for salt. So you may want to add a couple bags less. It's easier to add than to remove.
When I added my 12 bags, (do a couple of trips if you don't have a truck (don't overload your vehicle)), I added 9 or 10. Then brushed my sides down, it mostly dissolved in 1 hour or so. If you have your pump on aim a jet to the pile to help it dissolve. Dissolve time will also depend on water temp. So don't be too concerned. It will dissolve with time.
Good luck with your unit. It make pool care easier.