How to Collect a Memory From Part One to Seven?

Each person, between parts one and seven of the story, you can purchase one of the memories from part one to seven. And then i will create a piece of art, or one of one, that combines the two that you have bought. There's a few of them on the twitter page, actually showing what happens when people collaborate. A lot of this goes on in discord. I'm very new to discord, but i've been trying it out. The interactions are happening on the discord at the moment.