Login to your MCPE Index account, click Add Server and paste the IP into the field asking for the IP and then copy the port which you forwarded before (default is 19132) into the port field.
A hatcling is any animal that is newborn from a hard shell. Turtles are born from a hard shell cover. Thus, it should be called a hatchling. A hatchling is the newborn of animals that develop and emerge from within hard-shell eggs. The offspring of birds and reptiles are often hatched naked and with their eyes closed.
The length of incubation (or amount of time it takes for eggs to hatch) depends a lot on weather conditions. Temperature, humidity, rainfall, and other factors influence incubation. Generally, land turtle incubation ranges from 45-90 days (I know that's a long time to wait when you want to see baby turtles!). I suggest you start checking on the nest every couple days starting at the six week point. I wouldn't expect to see any babies until August at the earliest.