Hi SuperDude and welcome to the forum!! 
Enjoy your stay 
There are many threads about dream recall (you can use the “search” button on this forum). Here’s a link to a recent thread with lots of tips in it: https://community.ld4all.com/t/dream-recall/8312
You can fully experience the beginning of a dream through WILD. Normally (at least in my case) it begins with pixels of hypnagogic imagery (images, impressions you see after you fall asleep) which keep growing and morphing until the whole environment has changed from pitch back to a vivid dream landscape. This is where the dream begins. If you’re not lucid, it’s hard to remember the exact beginning of a dream when you wake up.
Generally, the end of a dream is easier to remember (especially when you’re lucid). Your sight becomes blurry, it seems as if the dream itself is falling into pieces and sometimes you can hear loud thunder noises while everything is shaking like hell. The dream becomes increasingly unstable and dissolves faster and faster until you wake up (sometimes you may find yourself in a blurring chaotic kind of white TV-noise environment, but this lasts only a few seconds). A main problem for LDers is to find good methods to prolong their dreams. Therefore it’s indeed handy to recognize the signs that the end of your dream is near, so you can act quickly.
It can be difficult indeed to determine whether or not certain scenes belong to one long dream or different ones. The transition between two dream periods during the night is coupled with a very brief awakening (you normally can’t remember these ultrashort awakenings in the morning). The trick is to wake up consciously after or during one of these dream periods, so that you can fully remember the dream of the previous dream period.
Good luck with your future dreaming!! 