Added 'Getting Started' button and started improving homepage style

[Giovym]

Description

This pull request introduces two main changes:

1. Added "Getting Started" and "Learn More" buttons to the homepage that provides quick access to the "Getting Started" section and to the new Resources page.
2. Made style improvements to the homepage.

I've opened this pull request to address a specific aspect of issue #133, which is the improvement of the "Getting Started" navigation, while also initiating the process of modernizing the homepage's style. I'm also open to different ideas and approaches for implementing these changes.

Related Issues

Partially addresses [#133]