1. Install WordPress on Your server

Before You add a theme, you have to install Wordpress. If You are not familiar to install Wordpress, follow the instructions in the Wordpress Codex: Installing Wordpress

2. Install Lakshmi Lite theme

Go to Appearance » Themes in WordPress admin. Click Add New and then search the theme. After the installation completed, activate the theme.

3. Install the recommended plugins

Begin installing plugins. You can start it from the top bar or from Appearance » Install plugins menu.

Select all plugins and install them. After the install go back to the dashboard.

4. Install the demo content (optional)

Go to Tools » Demo Content Install in WordPress admin install one of the demos.

Refresh the permalink structure at Settings » Permalinks in WordPress admin. You don't have to change anything, only click save. It will fix the 404 errors for the imported blog posts.

5. Have fun!

It is Your turn from this. Change the site options at the customizer, edit the sliders at Appearance » Sliders and use the page builder at the page editor. For detailed documentations visit this link.