Some of this is fine to handle yourself. Wiping down tracks, checking that the photo-eye sensors are aligned, tightening visible hardware, and applying the right lubricant to rollers and hinges - all reasonable homeowner tasks, and doing them a couple times a year will stretch the life of original 1970s-80s hardware that's already outlived its rated cycles.
What we don't recommend you touch is the torsion spring itself. It's under enough stored tension to cause a serious injury if it's released wrong, and on an older door you often can't tell by looking whether the spring is near the end of its life or already compromised. Cable adjustment and anything involving the winding cones falls in the same category. If your door is sagging on one side, slamming down instead of lowering smoothly, or the opener is straining and reversing, that's a sign the spring is losing tension - not a DIY fix, just a call.