Basically I use cliptoolz to add timecode and reel numbers and get the files into the format I require, then open them in Davinci resolve and go through and pick my 'hero shots' that represent each scene and thumbnail them.

Then I do a basic Primary grade using the wheels via a control surface, and check the scopes to see if I need to bring the black and white points to where they should be.

Then it is a matter of going through shot by shot basically.

Both Cliptools and Davnici Resolve are available in free versions.

http://hdcinematics.com/convert-V2.html

https://www.blackmagicdesign.com/