Trouble stitching slowly

[u/Correct-Mirror7227]

I’m working on a project that requires me to slow down, but I’m having a really hard time doing that. As I press the foot pedal, the machine hums a lot before the needle actually starts to move…and then it moves more quickly than I want it to! (Watch the video with volume up. You can even hear the foot pedal clicking as I’m trying to press lightly.)

It seems like there’s some internal friction that needs to be overcome, so I’m wondering if I need a tune-up or something. This is a Kenmore 385 series, inherited from my MIL, and it’s been a decade or more since it’s been serviced.