Hello guys, how are you?!

So, I'm a total beginner, but very curious about LDreaming. I understand that there are a few similar topics, but I just wanted to share my own personal experiences so far, as the particular details may change what I should do.

Ok. So, I already meditate for quite some time, so I thought that maybe WILD would be a bit easier for me (maybe there's no connection at all). And I'm also doing the reallity checks while awake. So, I already tried setting up an alarm 6:15h, 4:45h and 3:15h after I go to bed. I dont really know how long I take to sleep, but I think 15-20min is enough time.
I wake up at night. I saw some people talking about staying up for 40min or even 1hour, but I think that if I stay up for this long I would be too energetic to sleep again, so I tried staying up for like 10-15 minutes.
I lay down afterwards, on my side, and start to kinda meditate, breathing and relaxing my body. After a while I feel my body getting heavy but at the same time I almost cant feel the mattress. I think I can handle the swallowing and moving urges, but now the problems begin:

-Sometimes I found it hard to breathe, and my heart suddenly starts beating very very fast. I try to stay calm and breathe slowly, but I dont know what this means, because I don't feel that I'm actually paralysed at this point, just my body is felling heavy.

-I don't really get the hypnagogia thing. Should I be trying to see stuff with my actual EYES, like paying atetion to the black, looking for patterns, or should I just leave the imagination going? I feel like my imagination is more vivid sometimes, but nothing close to actually seeing colors, lights or 3D stuff.

-Sometimes I feel like my imagination gets very vivid (but still with no visual images) and I almost fall asleep, with an actual falling sensation. But everytime this happens, I think that I should stay aware and I feel butterflies on the stomach and go back to black, to nothing. Together with that, two times, I heard some buzzing noise. But it also stopped after 1-2 seconds.

-The last try I decided to keep with it, trying to pay atention to different things, relax more, everything. I actually tried for 1 full hour before giving up!

That's it for now. Any suggestions? Am I too awake, or trying too hard to be lucid? Do you actually have to fall asleep for WILD to work? Did I get close with the falling sensation or was I just falling asleep into normal dreams?

Thanks guys!! Any tip will help a lot!!