There’s nothing really to tell you about Krka. If you want to go see it, go! You can drive easily to the falls and park in their ample lot and then you just buy tickets to either explore the park by foot (where you just walk along the wooded path to see the waterfalls), or explore the park by a slow moving and often times crowded boat (which we wouldn’t recommend) or both.
Buy your tickets, walk the loop and finish at the main swimming hole and waterfall where there are food and drink stands and plenty of people swimming and sunbathing. It’s stunningly beautiful, but typically very crowded and full of children…you really only need a couple hours at the most to walk around, check it out and maybe take a quick swim.