drywall ceiling profiling

I want to build a simple drywall dropped "ceiling" in one of our rooms. The idea is simple, it’d go all around the room for a led strip lighting, and in the middle there would be an "island" with led strip around the edges (hidden of course) and spots in the middle. I however have a pretty hard time understanding how to frame with the profiles we have around here.

We have 2 types:

• UD
• CD

https://www.amazon.co.uk/Profile-Drywall-Plasterboard-Ceiling-Extension/dp/B07DLVM766

So from this two I’m trying to come up with a plan for the part that goes around the room walls.

However, I don’t know how I should be doing it to be honest. I can see a whole bunch of youtube videos but most of the time I see those fancy exotic profiles which we don’t have, or simply shows the design, empty room, done. Couple russian videos show the process but can’t see how they fix the profiles together.

So my question, which should I use, though both has questionable parts.

1. I fix one UD profile to the wall, and another to the ceiling.
2. I take the CD profiles and stack them into the UD on the wall and screw them together from the bottom.
3. I take another UD and attach it to the other end of the CD profiles and again screw them from the bottom.
4. Now, I could screw the drywall sheet to the bottom, but it’d just bend the profiles, so I need a whole bunch more CD profile from the ceiling and screw them from the outside (not the wall side).
5. Since the UD profile opens towards the wall, I can’t screw the CDs to the UD, other than fixing them with a vertical drywall that I screw into the upper UD, the vertical CDs and the lower UD.

I kinda feel like that’s just a recipe for a drywall falling down on my head during a TV session when the screws tear out of the drywall due to the weight of the horizontal portion. On the other hand it’s a lot cleaner than the other that solves this problem to introduce another…

1. UD to wall and ceiling
2. CDs from the wall but to the whole length of the drywall panel.
3. instead of using CD-s from the ceiling, I’d use 2 vertical UD profiles for each horizontal CD profile, and basically sandwich the CDs in between the UDs so I can screw those together.

The downside, I cannot attach the LED strip and I need an extra sheet of drywall for mounting it and I loose around 3centimeters due to the height of the profiles. Any tips?

@Update:

Seems like the 2nd option will do the trick. At least in paper it looks promising:

I really hope 50mm of opening for the LED strip lighting will be sufficient; not like it should illuminate the room but still.