32 x 16 x 52 intex pool

We have had trouble keeping this pool clean with the included Krystal Klear swg and sand filter. Especially in the corners like the flow just isn't getting there. We were considering whether a stronger pump would help, but it looks like the pump itself is not able to be separated from the rest...

Do we need to wait to get in the pool a certain amount of time after adding? I have read to turn off salt water generator but turn on pump As you insert salt. The directions with the pool are confusing. Husband and I are terribly stressed. We have never had a pool and we seem to...