It isn't that hard to get the tire on/off the rim....if that part of the job is all that you are worried about. I have changed all 4 of our Savage tires (and dozens more). The bigger part is jacking the bike up, etc.
1. Get a decent pair of tire tools for $15-20. Cheap ones will bend. Don't even think about using a large screw driver.
2. Fill an empty spray bottle with a soapy water solution and use generously on the bead and the rim.
3. Always be sure NOT to pinch the new tube with the tools OR the bead of the tire.
4. Get a little tool to remove the valve stem valve on the tube (speeds things up). Some valve stem caps work for that...
5. Make sure the spoke end protector strip (whatever you call it) is in good shape around the wheel.
6. Be sure to position the "Dot" on the side of the tire at the valve stem. It is a manufacturer's balance mark.
7. Be sure to point the rotation arrow on the tire in the right direction (that one's got me before).
8. Once you have one bead of the tire on the rim, install the tube in the tire and rim and put the nut loosely on the stem. Make sure the valve stem is straight in the hole and not "pulled". Then start installing the second tire bead at the valve stem area and move around from there.
8. Fill and deflate the tire 3-4 times to make sure the tire is centered on the rim and the tube is centered in the tire. Fill it, bounce it, deflate it and make sure it looks good.
9. If you are doing the work on concrete, use an old piece of carpet to keep from scratching the rim or brake rotor.
10. Remember....Be patient. The first tire change is a struggle for anyone. Be prepared to feel stupid and issue a few cuss words as needed. But once you do it....you'll be just as good as any "stoner dude"
I only have photos of a front tire change...