I was in my early 40's when diagnosed. I also sought out information from support groups and found folks mostly in their 60's and up, many of whom were fairly affected with PD. Although 'typical' support groups certainly serve their purpose, it wasn't what I needed at the time.
There are many alternatives such as this and other PD websites. There are wonderful folks out there who will answer any question or concern. As yekkimo said, a good one is www.yopa.org They've been having some issues with their website and chat, but it appeared to be working earlier this evening for the first time in several days. If you have issues getting to the site, please try again another time.
Another alternative is to start your own young onset support group, which I did. Both the National Parkinson Foundation (NPF) and American Parkinson Disease Association (APDA) have literature on starting a support group. A support group can entail anything from meeting for coffee (decaf for me because of the tremors) to organizing meetings, symposiums, etc. It's all in what meets your needs.
I was/am a private person also. But we are in the battle of our lives. The more we can learn and share, the better we all are. This isn't about you/me ... it's about fighting back against a disease.
As a 'younger' person (OK, I'm 52 now and not-so-young), I am a believer in exercise - rigorous exercise - for people with Parkinson's. I've been involved in a boxing-based fitness program (offered free of charge so no solicitation here) for people with Parkinson's. It aggravates my tremors for 30-60 minutes, but improves my symptoms overall for a couple of days. I would strongly encourage you to get involved in a rigorous - or any - exercise program. It's also a great stress reliever!
Best of luck to you!