easy way is to replace
java -Xmx1G -jar forge-1.19.2-43.1.1-installer.jar
with
java -Xmx1G -jar C:\Users\tlnie\Downloads\forge-1.19.2-43.1.1-installer.jar which may not work because i can't really guess where the file is.
super easy way is to install multimc, make a game version, add forge to it (there is a command in multimc), then download a few mods and move them into mods folder which you can open from multimc and you don't even need to know where it is.