Welcome Gibly! I really like your idea for how you want your beard to eventually look. I just want to be sure you understand what you are signing up for. The chin rope braid idea will require probably two years worth of untrimmed growth to make that look nice. Also, I think that look would be silly without a big mustache, especially if you are going to do braids down the sides. Do as Tom suggests and train the stache to the sides.
I am very excited to see how your beard progresses because you do look to have excellent bearding genes!