Congratulations on a wonderful sewing machine. I own several of these beauties and love them all!
You can definitely service them yourself if you take your time and do some reading. To start, I would try to get a hold of the original manual as well as the
service manual for your particular machine. I joined the
Yahoo Vintage Singer group where you can download most of the manuals for free! There is a ton of information in there so it's really a great site. Another good site is Jenny's:
Sew Classic Blog. She goes into detail about the machines and covers some basic information that I found very useful.
You should be able to clean and tune-up this machine with the help of the manuals. The only area that I would advise you to be careful with is with any of the wiring- from the light fixture, to motor and power cords. You may need to re-wire most of these parts and it should be handled by someone who knows what they are doing.
Also, here's my article I wrote for the blog which might be helfpul as well:
Using and Purchasing an Older Sewing Machine.
Good luck and have fun!