In content HLG H.265

Hi all Shotcut enthusiast’s.
I record video with my Sony Xperia 5 II, mobile phone, and the included Sony app Cinema Pro.
The content is recorded in Codec H.265 and HDR HLG, no options here.
I usually use 4K and 23.98 frames per second but some times 120 fps.

Can I have advice, what is the best settings/work flow to import the video content and edit it in Shotcut?
Edit include color grade.

I use a laptop with Intel® Core™ i7-4700MQ CPU @ 2.40GHz, 16,0 GB ram and a GeForce GTX 770M.

Regarding editing HLG, Shotcut does not currently operate on HDR content. There is an option to convert to edit friendly with an advanced option to convert to 709 colorspace. If you convert to 709, you can edit the files, and the final output will look OK, but will not be HDR/HLG.

Regarding color grade, you can search specifically for that topic in this forum. Here are a few samples: