[EU] Buying company shares at my job - worth it?

As the title mentions, the company I work at is offering free shares when buying back some of the company's shares, as well as a discount, depending on the amount of shares purchased.

Could any of you advise me if it would be a good idea to start investing into this? If not, could anyone suggest any other investment avenues to a complete n00b like me?

Thanks in advance!