fork and license?

Hi there, i have found your wonderful ORC project. since some time i have played around using my own fork. changed bits here and there. now i am wondering - can i do that in terms of license ( it is just a private playground for me, with no intention to make any money or whatsoever from it)? in all files there is a (c) 2021 Matías Godoy. If i need to add or remove anything from my files, please let me know!! (https://github.com/pcace/open-rally-computer/tree/dev) the changes i made to the code are: - use different display and library -use sd card for memory (i know fram is much more reliable, but i just had non laying around...) - use sd card for recording track - add webserver wich provides recorded tracks - add 2d Compass in the heading menu - read voltage from voltage devider and add to status bar - add "save-POI" function when in "track" page and thanks again for this awesome project!!