new to reta pls help

after mixing the reta with bac water and already puncturing the reta, then using my needle to pin, how do i store it after? i’ve heard to put it in the fridge and put aluminum foil around it so that no light gets to it but idk if there is a better way

since there is already a hole in the cap from the first time i used it, is it still safe to use for my next use? as in, do i put away the reta, take it out when i next need it, and put a new needle into the already punctured hole? this part confuses me the most because keeping the punctured hole open in a fridge seems unsanitary but i dont see anybody mentioning how it should be stored after puncturing

when i first receive the reta and mix it with the bac water, can i pin right after or should i put it in the fridge for a little while so that it is chilled when i pin?

kind of similar to #3, after storing my reta in the fridge until the next use should i be pinning right after taking it out the fridge or waiting a little for it to get room temperature?

how long are you guys keeping ur reta in the fridge before discarding it and it is no longer useable?