Sorry for this off topic post!
Good luck on your spring break travels. I subscribed to your YouTube channel for updates.
You don't need to wait to try out some of your gear and processes. Roll out the sleeping bag and mattress on the floor and start using them. Now is the time to get your morning routine sorted out. Roll out of the sleeping bag, do your morning tasks and head to school. On your trip it'll be like waking up, sorting out your kit and hitting the road.
Sounds strange, but tape off a small section of a kitchen counter that's sized for the space you have to prepare your meals in your vehicle and work within that space. Fire up your cook stove and start preparing meals with the pots and pans you intend to take.
By all means take your cat and keep a journal. It doesn't have to be paragraph after paragraph of text, small bullet points work for me.
I've been your age once, in college, living at my parents house, little or no privacy and money, often retreating to a local library or county park for solitude and piece of mind. There was no internet at that time. I had loving parents that always cared. Both wanted me to go to school, mom wanted college, but dad wanted me in the trades. There was always some tension there, but it all worked out. Just before mom's passing she told me I was her hero, and just before dad passed in July last year, he said he very proud of me. I miss them both.
Give it some time, focus and finish school. Wither it be joining the military, going to college or getting into the trades, the best investment you'll ever make is in yourself.
LoupGarou