Success! Neighbor gave me an old Dell Inspiron 1545. Linux Mint 20.2 uploaded. WiFi started working after update : r/linuxmint
RAM memory for Dell Inspiron 1545
Dell Inspiron 1545 - Replacing RAM module - Dell Community
8GB 2X4GB Memory RAM for Dell Inspiron 1545 200pin 800MHz PC2-6400 DDR2 SO-DIMM Black Diamond - video Dailymotion
Amazon.com: Dell Inspiron 1545 15.6-Inch Jet Black Laptop - Up to 4 Hours 34 Minutes of Battery Life, MS Home and Student Software Included (Windows 7 Home Premium) [Discontinued By Manufacturer] : Electronics
OFFTEK 4GB Replacement Memory RAM Upgrade for Dell Inspiron 1545 (DDR2-6400) Laptop Memory at Amazon.com