Don't sweat it. The 10/22 is about the easiest rifle you can imagine to put together!
I just built one with a Volquartsen THM barrel and Triggerguard 2000. It took me about 15 minutes to build the entire rifle from a pile of parts!
Note-the barrel was very hard to get on. I tapped it in to start with a rubber hammer and then pulled it the rest of the way on with the v-block on the receiver. This was the most difficult part of the entire assembly.
The trigger assembly is held in with two pins that you can push in by hand. There is also a large pin in the rear of the receiver that acts as a "buffer" for the bolt assembly. You need to put this pin in after you install the bolt.
Installing the bolt is a little tricky but not too difficult. You need to install the cocking handle and spring first. Then you have to pull it slightly to the rear as you slide the bolt in. The bolt has a notch that the handle has to fit in. It's not too hard, but you have to fiddle with it to get it just right. You'll see what I mean when you try.
Once you have the barrel and trigger assembly in, you just drop the action into the stock. There is only one screw that holds it into the stock.
So in summary, the rifle has three screws and three pins holding it together. This doesn't count your scope mount. I used the Volquartsen cantilever on mine. It's held on by two allen screws that mount to the barrel.
Good luck! Mine shoots great!
edited to add: heres a schematic at Brownell's that illustrates how all the parts fit together
www.brownells.com/aspx/NS/schematics/schemmfg.aspx?schemid=56&m=13&mn=Ruger%c2%ae&model=Model+10%2f22+R%2c+RB+