To start using an Opensim based a virtual world it is possible to run a local copy of opensimulator in your own PC.
I have prepared a ready version of a virtual world with 4 islands.
-An island where find resources and materials. It is a modified version of an island downloaded from internet (author Linda Kellie)
-An empty island to build your stuff
-An island hosting a recycling plastic plant to be reused and modified
-a Chemistry related island.
to run the local copy follow the instruction of the video below:
-Download and install the firestorm viewer (opensim version)
-Download and unzip the file below.
-Enter in the "bin" folder and run Opensim.exe
-wait some minutes and resize the window.
-Run the firestorm viewer
-Set the grid to http://127.0.0.1:9000 (training).
-Insert the name and the password of the avatar (see in the main folder of the zip file).
In the world you can find other instructions.
See also the video above (in italian language)