Even with an energy density disparity the lower potential for fires and lower effective operating temps it's a huge upgrade for automotive applications. It'll definitely replace all 12v batteries.
The more discipline you can have without letting small lapses and setbacks get to you the better off you'll be in the future. Don't get set on something (job, relationship, philosophy) until you really know who you are and what you want, and explore WIDELY. Be honest and direct in your communication and you'll have less drama, the trash will take itself out. Find mentors, don't let them run your life. Use your body like a diesel truck.