Don't jump out!!!
Take the 18-55 and the 75-300......
charge the batteries
above 250 sec what you shooting a f1 car. 1st time out auto mode will be plenty, shutter priority only needed when shooting moving objects i.e. motorsport events and even then you dont need a shutter above 1/320 sec.
Auto will adjust ISO but if it a nice clear day and you playing with the shutter speed on the TV setting keep it to ISO 100 other tip is to up the manual exposure by 1 notch.
Any question pm me Ive had a 350 a few years ago now got a 40d, 1dmk2 and 1dmk3
NO camera not even A mkll or D3 would cope with say a balloon back lit in the sky in P mode...unless you know what you are doing.
I said shutter priority + 250th/sec is because the guy is noob...and noobs on DSLR tend to get a lot of camera shake when starting out.
the words DSLR = AUTO....should never ever mix.....!!!