My first port has been created: averia fonts (port.shar), it has been submitted with the bug submission form https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=217014; now it should wait to be included in FreeBSD.
I’ve choosen a project from FreeBSD IdeasPage: Solaris Doors IPC Implementation, the git repository: https://gitlab.com/alfix/doors (the README has an implementation overview).