This is a list of my (Eve's) personal favourite resources for the budding writer. I hope they help you on your writing journey, just like they did mine.
Young Writer's Workshop
This program is amazing... with lots of resources and helpful videos on all sorts of topics. You also get access to a private community with lots of like minded teens, were you can join accountability groups, and submit work for critiquing. It does cost a bit, but they have a pay what you can pay policy, so if you really don't think you can afford it, try contacting them and explain.
Go Teen Writer's Blog
This amazing blog is run by three women, who provide very helpful and practical advice, as well as resources for writing your story. There is also a private Facebook community attached to the blog, were you can find other teen writers, discuss writing related questions and get advice.
https://goteenwriters.com/blog/
Campfire
Honestly the best investment! Campfire allows you to keep track of timelines, places, cultures, characters, religions, magic systems, items, weapons, and add pictures for everything. If you have trouble remembering all the tiny details that make a story come alive, this might be the program you are looking for!

Steve Laube Agency
The largest Christian Writer's Agency, it's a good place to gain information about the world of publishing. The blog is especially informative. Besides, you never know when you might want an agent.
Podcasts
Finally, these are my favourite writing podcasts to listen to:
Helping Writers Become Authors - K.M. Weiland
Writing Excuses - Brandon Sanderson, Howard Tayler, Dan Wells, and Mary Robinette Kowal
Creat If Writing - Kirsten Oliphant