Bernie is right. Archery is a lot like life. You can pay somebody to do everything for you, and learn nothing, or you can take the bull by the horns and learn how to do some things yourself.
Setting up and tuning a bow is pretty basic stuff. The hardest thing for a new person is learning the lingo and applying it to your work. The more you do the more you learn and you can expect to mske mistakes along the way.
One good source of info is Easton's Tuning and Maintenance Guide. You can download a copy from
www.huntersfriend or a "sticky" at the top of the Tuning section at
www.archerytalk.com.
If you're serious about this archery stuff you should spend some time at local shop and ask questions. It also wouldn't hurt to find and join a local archery club and spend some time participating in some of the indoor activities such as target shooting. Doing this you can meet a lot of people who are willing to help you first hand, and make new friends along the way. Some clubs may even have indoor 3D shoots, which are a lot of fun.
And never be intimidated or embarrassed about not knowing anything. We were all in this boat at one time or another.