The National Novel Writing Month website has a platform for all writers during the month of November. The object of course is just to write, don't worry about grammar and editing. They will have lots of opportunities to gain support from other members. The cool thing about it too is that you can join other regions and meet people all over the world.
The goal is to write 50,000 words during the month. They have a tool where you can update your word count daily. You can also add excerpts of your book to share and receive input from other group members. You may be just as surprised as I was at the huge amount of participants. But the benefit of knowing you're not alone and others may be struggling as well is encouragement. Plus they will help motivate you to making it by the end of the month.
I bought Book in a Month: The Fool-Proof System for Writing a Novel in 30 Days