Do you live near or in a large city that may have a support group for people with Parkinson's? I would try to meet other patients ,as you say you live alone , my wife and I do know several people that manage caring for themselves alone, but do need a friend or two to count on for difficult days ,at times a neighbour may help.
My feeling is as that you are starting treatment early ,you will have plenty of time to sort things out and once you start ,anxiety hopefully turns into strength with good sound planning for your future.
I understand that it the UK , Parkinson's nurse experts are the main source of help after a medical doctor makes a PD evaluation. Heres hoping that you find a very helpful nurse that has time and the expertise to answer your questions perhaps try to write any questions down on paper in advance of meeting the PD specialist.
When my wife and me first heard a Dx of Parkinson's our kindly Doctor said it this way "The bad news is that you have Parkinson's, the good news is that you have Parkinson's" confused at first we thought about what was said and of course our Internist MD was correct , as she meant it could have been a more rapidly damaging disease or rapidly fatal disease (PD it itself is not a fatal disease) and that the good news is that much research is being done and of all brain diseases that one could get PD was the slowest and most treatable.