Question about my family’s future

I’ve happened to come across about €300,000 and I’m kind of stumped as I don’t know really know what to do I’ve never had that much amount of money in my life let alone that much at once so my first thought was to seek financial advice is that a good option? I appreciate everyone’s Response to this post.

I’m currently living in EU and I have a partner and 1 child for context.

TIA