I need a help! I want to know what's the correct order to run the this project?

[HsLOL]

I want to know what's the correct order to run this project.
I do three steps to get prepared.

1. I open my pychram(in windows system ) to find what the python modules I should install.

2.Then I pip all the python modules in the Linux and run the "python setup.py install".

3.At last I do these things before training.

"""""""
1)Change the paths in lines 97-98 & 102-103 of dota_image_split.py according to your local DOTA dataset directory.
Run python dota_image_split.py to crop train & val set images into smaller tiles, and generate per-tile label files into the directories you specified in step [1].
2)Change the lines 4-10 of dotav1_rotational_detection.py. Paths in lines 5-8 shall direct to the folders containing the cropped image tiles and label files generated in step [2].
3)Have fun with sh rtools/train.sh and watch the model train!
"""""""

I want to know my order is right? And I want to know whas is the function of the requirement.txt ?
Thank you very much!!!