Some of it, yes. Lubricating rollers and hinges, tightening loose hardware, and clearing track debris are all fair game for a homeowner with an afternoon and a ladder. Replacing a torsion spring on a door from the 1967-era stock that dominates Spotswood is not on that list - those springs are wound under enough tension to break a wrist or worse, and a lot of the original hardware on houses this age uses sizing that doesn't match what's sold off the shelf today.
If your opener is straining, groaning, or reversing on its own, that's usually the spring talking, not the motor. Don't keep running it hoping it clears up. A door that's out of balance puts extra load on cables and the opener's gearing every single cycle, and that turns a $200 spring job into a $200 spring job plus a new opener. Know your limit: anything involving the torsion bar, the cables, or the bottom brackets under load is a call, not a project.