cd ~
sudo wget https://dl.eff.org/certbot-auto && sudo chmod a+x certbot-auto
sudo ./certbot-auto --apache --agree-tos --email stuartiannaylor@outlook.com -d nextcloud.vote4u.org.uk -d office.vote4u.org.uk
Using my test domains as an example, it will do the rest for you.
I did a bit of a tutorial with my noob experience, just use it as an example for yours.