Steep learning curve .. tivoweb telnet etc

I now have the altEPG disk and am trying to learn about new stuff ..
I can get onto tivoweb and have looked around, but not attempted to do anything with it ..
Similarly I see mention of Telnet and hacks and Bash prompts .. seems all very glamourous
Is there one place I can learn about this new universe?
One thing I would like to learn to do, now that the potential saved recordings on a 1 gig disk is big, is sort my now-playing list by name which I think appears to be available in a hack
and what other goodies may be available/
I can get onto tivoweb and have looked around, but not attempted to do anything with it ..
Similarly I see mention of Telnet and hacks and Bash prompts .. seems all very glamourous
Is there one place I can learn about this new universe?
One thing I would like to learn to do, now that the potential saved recordings on a 1 gig disk is big, is sort my now-playing list by name which I think appears to be available in a hack
and what other goodies may be available/