if you let your mouse hover over those terms an explanation will pop up, and there’s a sticky topic on the Lucidity Intro board that answers these questions for newbies, here’s a link
https://community.ld4all.com/t/what-are-all-those-acronyms-ld-rc-nd-fa-etc/21605
i would think it’d be more helpful to remember a more substantial portion of your dreams, but it’s a start, keep at it
be patient, don’t force it… we’re all different, but i think it’s safe to say for the most of us who aren’t natural LDers, it takes time to develop the skill
depends on how good you are at staying in the dream and staying relaxed (getting over-excited is a sure way to wake up) my first LDs lasted like 3 seconds cause i got so excited that i finally realized i was dreaming… my longest LD was probably 10 minutes, but i’ve read people’s accounts that lasted much longer
yes
it’s cool, next time look around on the forum a lil bit, lots of these questions have already been answered. welcome to the forum and good luck with lucid dreaming 