really really new to this, hoping to get some help

i'll make it short although i have like a million question..

my seeds should arrive like next week or something, i live in israel, october is still very sunny in here, around 26-30c, could be a little rainy at early november (expecting no rains or maybe 1-2 days of rain in october).
im very confused with the soil i should use, if i should use rockwool for the seedling and plant in the soil, should i use pearlite and soil mix or maybe humus as well..
i plan to plant in quite a big field, lots of sun, but the soil looks dry and stiff, im confused about everything almost, what kind of water should i use to water, should i use nutrients with every watering from the beginning or no.. i need a starters guide that is exact, im really nervous about it, if i could get some of these questions answered i'd be grateful.

Growing outdoors is completely different from growing indoors. The first thing id tell you is, relax. Weed is easier to grow than people make it seem. A lot of beginner growers overly complicate things and end up making mistakes, that they then in turn OVER-compensate for, and then they're really in trouble.

You say you have about a week until your seeds get there. Use that time to do a lot of research. Post on these boards, I just started posting here too and all of my questions have been answered fairly thoroughly. You say you have a million questions, well trust me, theres no shortage of opinions and help here! Good and bad lol.
Make sure the info you get is on outdoor gardening specifically. Some of the principles of indoor hydro gardening can be applied to growing outdoors, but generally outdoor gardening is a completely different beast.

As far as starting you seedlings in rock wool and transplanting into soil, you can do that if you dont want to buy a bunch of small pots. I just use 16oz (.5L) plastic bottles cut in half with small holes in the bottoms for drainage. You can grow a plant 3-5 inches (9-15cm) in a pot that big. That way, when you get your seeds, all you need to do is buy a small bag of potting soil (visit your local hydroponic store to find the best soil pre-mixed soil created for cannabis growth), and a cheap pack of waters and your set for at lest three weeks before you have to buy much else. That'll give you some time to become more knowledgeable and find supplies.

I dont know how big your field is or how much money your planning on spending, but if its hard and poor in nutrients, it sounds like most of your time and money is gonna be spent ploughing and amending your field with organics. In my opinion, its a little late to start a big outdoor garden. I think you might have lost your chance this season. Youd have to flower into december to get a good yeild. Then again, i dont know anything about Israel.
Sorry for being vauge, but you asking a mouthful. There are books and books of information on outdoor gardening. If your planting outdoors you must have some money, id suggest investing part of that money into research (books) considering how much you want to know about outdoor gardening.
good luck-happy toking