First time Backpacker – TCT a good choice?

Hello, I really enjoy hiking and camping but have never been backpacking! I recently purchased my first backpack and camping stove and am eager to plan my first adventure. I have never been to Catalina and couldn't imagine a better way to explore it. I was wondering if you think the TCT is a good choice for my first trip? I plan to go with a friend (who has never done it either). I am comfortable 'roughing it' and walking long distances, but I'm not experienced with: what to bring, how to prepare/pack, and how to gain fresh water (although reading your post it appears there is water at each campsite - so would I need to bring a water filtration system?). I'm not afraid of a challenge but want to make sure I set myself up for success! I enjoyed reading your post about the trail, it really made me want to hike this trail! Thanks, Becky