Yes, some homeowners are pretty handy at repairing small items in and around the house – often with great success . . . equally often ending in the emergency room.
While it’s unlikely that your garage door will lead to loss of limb or reputation you may try and do a job that you don’t have the right tools or skillset for, causing greater damage with greater cost implications further down the DIY line.
Some problems are best left in the care of professional garage door technicians such as employed by GarageDoor24.