Hello. Thanks for mapping.
Please do not use the tag footway since that is mend to be used in urban areas. Please read what this wiki says about it.
About tagging of highways
Please read and follow the tagging rules on this linked document.
Decision tree, which tag to be used for roads
https://drive.google.com/file/d/1S48CEVi3yiAYWhIJu57jtLyv0ZVUbGwJ/view?usp=share_link
https://wiki.openstreetmap.org/wiki/East_Africa_Tagging_Guidelines
Best regards