http to https

I know CI4 is not quite production ready and I also know that when on a live site settings should be to "production" however I have a development domain and hosting site and i have time on my hands now, which i might not get later.

I have got the basics of a generic web set up using CI4 at : http://www.benxmidia.com

(midia is deliberately spelt wrong before someone mentions it )

All the basics are working :
                                            bootstrap4 & breakpoints
                                          contact form to my email
                                        and a light CMS feature and login
                                       a basic captcha

now i now want to try to shift from http to https

On my hosting via cpanel there is a "lets encrypt" functionality.
Now in the docs i did see that in a controller i could use https_force(0 in a controller. Can someone
elaborate on steps to get CI4 to work with https on the basis that I have set up "lets encrypt"