First of all, sorry if this is not the correct place. My question is not about bitcoin nor cryptocurrencies. But I believe someone here can help me.

I know the basics of how blockchain works. I'd like to create my own blockchain with my own data format and rules to accept the info in the block.

However, I don't want to get too deep in:

• Peer to peer connections;
• Solving concurrency/tie;
• Gossip protocol;

Is there an open source project where I can fork and apply my own customization?

I saw a feel implementations. But they are more about mining a single block and chain it with the others.