"Learning Fortran in 2023" https://www.youtube.com/watch?v=PvUQndB8R9s
Coupled with a notebook like experience, one gets Python like experience, coupled with one of the HPC performance kings, and that is what LFortran is trying to achieve.
It gave way to BASIC, and last I knew in 2000 we were using Visual BASIC.
OpenWatcom FORTRAN 77 is here: https://openwatcom.org/ftp/install/
GNUFORTRAN is here: https://gcc.gnu.org/fortran/
GNUFORTRAN is part of GCC: https://gcc.gnu.org/wiki/GFortran