Just apply Chroma Key on the pink background
You should consider if you have the same rose in the picture it will also be transparent. XEON-E5-2680 v4 / Mem. 16GB DDR4
M.2 NVME 512Gb / 2-SSD Sata3 1TB
AMD RX570 / Display Philips 272V8
Windows 11_64Pro / PD22/365

With PD Cromakey you can virtually remove any color, it does not have to be green. Green is usually used because that color is most unlikly to be present in the human skin. Not the human but the background has to be replaced.
You can use PD (PIP designer) to deal with the pink background. With ColorDirector you have more options, but I certainly would give it a try with PD itself.

Thanks in advance for being so patient with me
I used chromakey to transfer the background from Pink to Black
So far so good
That much I did without causing a major malfunction
Now, to put a static background on it...

Or should I have changed the Black background to transparent (if possible) Intel i5-9400F / B 360M MB (MS-7B19) 2.9 Ghz /
32 GB DDR4 / Radeon RX580
Personal website https://www.PENwords.net
.

No when you change the pink to black using chroma key, you have done what is needed to remove the pink. The black you see in the default void "color". What you should do is moving the video to a lower track leaving spave for a background color, color board or even a picture or a video. You will then notice that the black happens to be transparent and that you will see what is in the track above where before it was pink made black by the chromakey. (assuming that you have the regular PD track order set). The black that was balck before the chromakey thing, remains black!
You may also see that because of pink variations not all pink is gone and that you have to go back to the chroma key to change the color range and/or the tollerance a bit.

https://www.cyberlink.com/learning/powerdirector-video-editing-software?category=2

XEON-E5-2680 v4 / Mem. 16GB DDR4
M.2 NVME 512Gb / 2-SSD Sata3 1TB
AMD RX570 / Display Philips 272V8
Windows 11_64Pro / PD22/365

Got it!
Thanks so much.
Threw this together:
https://www.youtube.com/watch?v=uBs-zNoLVgQ&t=2s Intel i5-9400F / B 360M MB (MS-7B19) 2.9 Ghz /
32 GB DDR4 / Radeon RX580
Personal website https://www.PENwords.net
.