My new set up ! but im still noob :( HELP

[Steenamaroo]

I have a thing called "Camtasia" for capture...it works very well but it's not free (somebody gives it to me).

I don't remember it well but I know I trialled it at some point.
I had actually given up on finding a software solution that would take those three feeds independently whilst capturing game video without an FPS hit.
OBS ticked all the boxes and is free!