You can do a few things yourself without tools. Pull the release handle with the door closed and see if it lifts by hand with roughly the effort of lifting a bag of mulch - if it's heavier than that, a spring's lost tension and it's not a DIY spring job, full stop. Springs under load are the one thing on a garage door that can put you in the ER. Leave that one to a call.
What you can safely check: the rubber weatherseal at the bottom of the door, the photo-eye sensors near the floor for dust or spider webs, and whether the door still reverses when something blocks the eyes. In the mild coastal climate here, corrosion on exposed hardware is a slower problem than it is in humid, harsher regions, but salt air off the harbor still finds its way to unprotected fasteners and rollers over enough years. A can of dry lubricant on the rollers and hinges, sprayed twice a year, does more good than most homeowners expect.