Joining the team for BOINC is a bit more complicated as the setting need to be done for every project you decide to contribute to. Historically for some projects are mutiple teams created linking for DC team homed at hardforum. Please see here to get the latest details on what team for what project is most suitable.
The configuration for BOINC can be very overwelming for the beginner (and often enough also for long time members). But don't worry, we get you covered.
Setup a project
Using an account manager
Once you become more exeperienced with BOINC you might want to try advanced settings
Installation of BOINC client from source code
What is bunkering ?
Here some more topics beyond the already advanced setting.
Beside the standard software there are also a number of 3rd party tools around.
BoincTasks, control multiple clients from one application