Help with Laravel initial setup

[cocothedestroyer]

I installed composer and laravel, but when attempting to run php artisan i get the following errors

`Warning: require(/Users/josephharker/code/myfirstsite/vendor/autoload.php): failed to open stream: No such file or directory in /Users/josephharker/code/myfirstsite/artisan on line 18

Fatal error: require(): Failed opening required '/Users/josephharker/code/myfirstsite/vendor/autoload.php' (include_path='.:') in /Users/josephharker/code/myfirstsite/artisan on line 18
(base) Josephs-MBP:myfirstsite josephharker$ `

Here is a snippet of my PATH

//anaconda3/bin://anaconda3/condabin:/Users/josephharker/bin:/Users/josephharker/bin:/usr/local/bin:/usr/local/lib:/Users/josephharker/.composer/vendor/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/X11/bin

Could anyone shed light on the issues I am having? I am new to this stuff, so be gentle