How long does it take a first-timer to install RAM?

A first-timer can install RAM in under an hour, maybe 30 minutes if you take your time and read the manual. The actual physical install takes 30 seconds per stick, but most of the time is spent being careful — unplugging the system, checking the motherboard manual for slot order (usually slots 2 and 4 first), and making sure the RAM is fully seated. Don’t rush, and you’ll be done before your coffee gets cold.