CUCC uses the platform-portable Survex package - this has its own home page and can be downloaded free. It also has a mailing list to keep you up to date with new releases and the like. Send a message with just the word subscribe in the body to mailto:survex-subscribe@survex.com to subscribe, or use the web form which includes a bit more explanation.
Output from Survex (and a number of other survey programs that can now generate .3d files in the same format) is typically viewed on-screen with a graphics utility called CaveRot. Users should note that the mailing list for technical discussions of this utility is now discontinued as the pace of development slackens. However, discussion of CaveRot is welcomed on the main Survex mailing list.
You can find a list of other available surveying software on Andrew Brooks' site (along with pages for BCRA and its various special interest groups, and quite a lot of other caving clubs).
For more discussion on Cave Surveying, there is a specialist mailing list. Subscribe by sending a "subscribe" message to mailto:cave-surveying-subscribe@survex.com. Most of the discussion here is not at the beginning-surveyor level, however.
You might also like to join the Cave Surveying special interest group of the British Cave Research Association. This publishes the quarterly Compass Points, which is also available on the web, some time after the printed edition (the delay depends somewhat on how much work the webmaster has to do on this site before finding time for Compass Points :-)