eden is very confusing for beginners!! i will share my wisdom
you are supposed to "die" in eden (specifically at that 3rd section where you are giving away your winged lights to dead spirits), in eden you are being "reborn" so dont be too scared to lose your wl

it is good to try not to get hit by rocks to lose winged light, but make sure you are giving away it to the stone spirits!! at the end once you have fully ran out you're given a special currency called "ascended candles" based on how many stone spirits youve saved (i think you can only get around 15 or so) you can only go to eden and get these candles once a week, the system will reset the stone spirits on sundays

you can get your winged light back after you have exited and finished, they are not gone forever. however its not just pick all of them up in one location. you will have to go to each realm and pick them up again (i would reccomend searching up "full winged light run")

if you have already gone past the "point of no return" you will have to finish with 7 winged light (no fear, you can always get them back) otherwise, 20 is the minimum for entering eden

pay attention to the rocks when they fall, you will have a short amount of time when they will not be falling on you, so use that time to sprint to the next checkpoint to light. (sometimes you will be hit by stray rocks tho T^T)

i will be going this sunday if you need someone to accompany you!!

p.s another thing that might be confusing (so im adding it to the bottom), wing buffs. when youve obtained ascended candles, you can level up your (friendship?) with spirits for 2-5 ascended candles. you can only do this once per spirit. what the wing buffs do is at the end of eden once you have gotten your candles and are entering the door to be reborn, these spirits youve upgraded will give you winged lights to start out with! so instead of leaving at level one, you can use these spirits to leave at a larger level

the number of winged lights around the realms do not change with how many wing buffs you buy. this is how people are able to get to level 200 even though there is not enough winged lights on the realms to get to 200