Writing a book can be a big and scary process—and it can also be lonely and demotivating if you don't have anyone to share the process with. Often creative people struggle to find people they can relate to and share their journeys with (and non-creative people aren't always interested in their journeys).
Fear not, writerly friends! You can totally make writing and other-types-of-creative friends, and there are people out there who can't wait to meet you. It's not even as hard as you think it is; you already have stuff in common that excites you and you know what it is to be brought alive by art and there is no stronger people-connector than that.