SAAA (Scottish American Athletic Association) has a pretty good 'move up' guideline posted.
http://www.saaa-net.org/old%20site/saaa_moveup.htm

For a first timer, try to get somewhere close to the C class numbers. A few feet short is no big deal, but you probably want to be around 75-80% of whatever they are throwing.

For a C/Novice you would probably want to throw around these numbers:

Braemar 24ft

Open 27ft

HWD 18ft

LWD 35f

Heavy Hammer 50ft

Light Hammer 60ft

WOB 10ft


Don't get discouraged if you aren't hitting those numbers, or even getting close right away. Those are actually pretty competitive numbers in most C competitions, so it's a goal to work towards, not a minimum standard to meet.