Nearly there, but here comes the hard bit!

Hmmm 432 square and round 3 complete!!! Wizzed through round 3! All my little squares look so cute all staked up in groups! Now comes the hard bit. I've got to start making it up, which I've only ever done using a needle. This pattern calls for it to be made up using a Double crochet to join the squares.....uncharted territory for me. I'm a bit nervous to say the least.....