Im not 100% sure what you are asking but if im reading the question right. Do you want to directly access your Website from anywhere in your Home Network by using the machines IP address?.
If this is case. follow the procedure below, edit 000-default.conf add your website folder name after DocumentRoot /var/www/. Save and exit the file. Restart Apache server and type IP address in a browser on any home system in your network. Your index page will loaded. If you requite Remote access then you need to add the IP Address of your web server in the section Virtual Servers on your home Router and make sure the Port is set to 80.
$ cd /etc/apache2/sites-enabled/
$ ls
000-default.conf
$ cat 000-default.conf
<VirtualHost *:80>
# The ServerName directive sets the request scheme, hostname and port that
# the server uses to identify itself. This is used when creating
# redirection URLs. In the context of virtual hosts, the ServerName
# specifies what hostname must appear in the request's Host: header to
# match this virtual host. For the default virtual host (this file) this
# value is not decisive as it is used as a last resort host regardless.
# However, you must set it for any further virtual host explicitly.
#ServerName www.example.com
ServerAdmin webmaster@localhost
DocumentRoot /var/www/mywebsite
# Available loglevels: trace8, ..., trace1, debug, info, notice, warn,
# error, crit, alert, emerg.
# It is also possible to configure the loglevel for particular
# modules, e.g.
#LogLevel info ssl:warn
ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined
# For most configuration files from conf-available/, which are
# enabled or disabled at a global level, it is possible to
# include a line for only one particular virtual host. For example the
# following line enables the CGI configuration for this host only
# after it has been globally disabled with "a2disconf".
#Include conf-available/serve-cgi-bin.conf
</VirtualHost>