You might want to look at Dronelink. I know some people like it but in my case I found that the simulated flight and the actual flight were not the same, and not in a good way. (On my Mavic 2 Pro)
Why don't you use the DJI GO4 app that was made for it. You can download it directly from DJI and it works great. Litchi works great as well and is relatively cheap. Litchi is great if you want to do automated missions, but otherwise no real...