TL;DNR Version: In short, I think you should forget about grading and instead concentrate on improving your lighting, your audio, and background music.
Long Version:
First, I wish you luck with your channel.
After reading your reply and watching the video you linked to on the MSI GS75 Stealth 2020 Model, I have these suggestions and requests:
1) I think you should (for now) stop worrying about grading / luts / filters and instead concentrate on lighting. You are getting a lot of mixed lighting (windows light, that is blue, and tungsten lights, that are orange, and your LED light), I would personally get a lot more light that is set to daylight (not bi-color because they are half as bright) and turn OFF as many tungsten or fluorescent lights as you can.
You mentioned you don't have room for soft boxes. I understand. Can you use umbrellas?
Another option is to one of the 5 in 1 reflectors with a white scrim and use your strobe lights to shoot through it.
Something like this:
Buy NEEWER 59"x79"/150x200cm Light Reflectors for Photography, Portable 5 in 1 Collapsible Multi Disc with Bag - Translucent, Silver, Gold, Black, White Diffuser for Studio and Outdoor Lighting online on Amazon.ae at best prices. ✓ Fast and free shipping ✓ free returns ✓ cash on delivery...
www.amazon.ae
There are MANY videos out there on how to properly light for an interview, or how to properly light for a zoom call. Those would be a good way to start.
2) We still need to know WHICH model of lumix camera you are using and which lens.
2A) Which software are you using to edit your videos?
3) Buy a gray card and learn to use it property. make sure the white balance on your camera is set properly to the gray card
4) your audio seems very quiet and there is not much high end. I think you should look at a) improving microphone placement, and b) recording at the right levels. What are you using to record your audio?
5) Consider using some low-volume background music. If you go to
www.soundimage.org you can find plenty of royalty-free music that just requires acknowledgement in the description of your video or in the ending credits of your video (but a donation is always appreciated).
6) Maybe consider having the title of your video in Arabic if possible instead of English since your entire video is in Arabic? Or at the beginning of the title write something that denotes it is in Arabic? Because youtube will probably punish you with ranking your video lower if people click on your video expecting it to be in English, and then click away after watching for a few seconds...
I mean, if someone posted a video on something that interested you with a title in Arabic, and then the whole video was in Japanese, you might be confused / upset, right?
7) You mentioned something about spending three days searching for grading tutorials. There are a TONS of tutorials out there on how to grade. But as I mentioned before, you should probably forget about grading for now and concentrate on lighting, white balance, and getting the shot right in camera.
8) You mentioned that you like the part of your video at the 14:00 mark. If that is what you like, it should be easy to find a free LUT that does something like that. It just seems to be increasing the contrast and saturation, particularly of the reds. And yes, it seems to be crushing the blacks.
9) what are you using for the close up shots where you are panning across the computer or doing a slider shot? If you plan on doing more of those, a motorized slighter with a motorized pan / parallax head would be good.
Hope this helps.