The configuration of your I2P is not a trivial job and takes some time and
knowledge to do it the perfect way.
First point "Network" is already open and contains the bandwidth
and connectivity settings you should already have
aopted to your needs.
For luck I2P runs fairly well in default setup - as long as your PC have
sufficient ressources to run I2P. Nevertheless you should at least setup
the core settings bandwidth and
connectivity on this page.
For more advanced setup and tweaks of your I2P router you need to select the links
on the upper menu on http://127.0.0.1:7657/config.jsp
site and adapt those settings to your needs and wishes.
Second point Service contains options to
start and stop I2P and the setting to open a browser on startup.
Next point Update tweaks the automatic update of
your I2P router.
Tunnels page let you tweak current destinations
for active I2P session only.
On clients page you are able to enable SAM bridge
or disable unwanted webapps.
Peers page is ment to manual adjust single values
for single routers, including shitlisting.
Keyring page prepares the functionality to
encrypt your destination IDs and let user add a public key to local keyring.
On logging page the behaviour of the
logs page is controlled.
Same on stats page for stats logging and graphs.
Last entry advanced finally shows you the
box for all config line options.