I thought the hardest part was the 1st couple of weeks getting used to the routine and everything that comes along with it. Yes the crucible is extremely hard, but you are prepared for it and motivated to go through it by the time you get to it at the end of boot camp knowing that it's the final...
Flat feet are not a disqualifying for the military any more. However it can be a really painful when running so many people buy support alleviate the pain
I know Chula Vista i used to live off hilltop and orange, ive also been stationed on Pendleton.
You can go and see your family on the weekends if you want.
Pendleton is in North County it's not like it's hours and hours away.
They can visit you too, and yes you can leave the base you are not...
You have to do everything right handed. I am left handed as well but learned quickly to do things as a right handed person. Especially holding my rifle.
You will learn hun, don't worry.