Find a friend with one, otherwise the key is to be smooth and really feel the clutch engagement. It’s different for every vehicle. Its a balance between clutch and gas. With a lower power car you’ll need more gas to balance while letting the clutch out. With an old manual truck, you pretty much need no gas input to get going because of torque. Another good way to learn could be just pick up an old g27 or g29 wheel (they have 3 pedals and a shifter either h pattern or paddles) and learn that way with a racing simple like LFS, Asetto Corsa, or Automobilista 2.
Depending where you live there’s all sorts of sub $800 manual cars. That’s how I learned (rusty $500 crx)
I keep saying this. As if humans aren’t dumb enough and lazy as hell without AI… I’ve met maybe 1 younger person out of hundreds that actually shows interest in learning and work ethic (the good kind, not boomerism). I’m not even old, but it’s looking like a dark road for humans. Now Fuck You, this is Carl’s Jr!