You say oh well just you just define this here, subtract and multiple this here..
Yes we do. The problem is that there are many people asking advice and they all have different ability levels. To address each one as a complete beginner would be time consuming, patronising and wasteful.
Once when I was very young I was on an exhibition stand in London showing off some active filters we had been working on at the Admiralty Underwater Weapons Establishment. I explained what the filters did to one person and he said "what's frequency". I was a bit shocked so the very next person to come to the stand I said "do you know what frequency means". He was very cross and said he was the professor of Electronics at Imperial Collage and stormed off.
all i ask is remember some of us do have alot to learn, and want too..
So what is the best way to learn. To point someone in the right direction and let them get on with things or to spoon feed and do it all for them. It's a fine judgement and to some extent decisions will be based on a gut feel. I don't know about others who spend time posting here ('other Gods' although I don't particularly like the term) but there are few names that stick in the mind and so it is difficult to remember past posts, although not past post topics. I even answered a post from my own Son without realising who he was despite having his real name as a user name. (my excuse was that all the names were rolled into one word with no spaces and I am dyslexic)
just be patient and some of us do require pretty pictures to grasp concepts you understand readily
That's one failing of this forum, the difficulty of posting pictures. Pictures are quite time consuming to produce and it is often easer to describe a simple circuit in words. However, it should be easy to take the words and produce a sketch.
Some pictures are very useful in understanding basic concepts. I spent a lot of time producing the animated picture of a PWM signal for this page:- PWM
However, if you feel that something has been "explained" and you don't understand it then please ask again, and again and again until you get an explanation that you feel happy with. There is always someone willing to answer you, that's the beauty of this forum.
As to your specific question what you are asking for is something that is out of the ordinary. It pushes the limits of what is readily available. So there are two possible solutions, one is that you don't actually need what you are asking for and can get away with something more readily available. The other is that you will have to custom make what you want. Now I know I would find making a power supply of your specifications quite daunting. In a conventional power supply the transformers are large and heavy, the capacitors are physically large, expensive and possibly prone to exploding if you don't get it right. There are different problems you need to cope with when handling large currents that simply are not an issue at say 1 to 3 amps. So I make the judgement if I don't fancy making one then you probably won't.
I feel we have a degree of responsibility not to lead a beginner astray and to point out the pit falls and maybe unforeseen difficulties. It is all too easy in electronics to imagine you can do anything you can imagine. Hence the beginners that regularly want to connect hundreds of LEDs to an arduino.
Then there are people who, while not having done much practical themselves are convinced it is all easy and hand out advice that is wrong or potentially dangerous.
Finally there is the point that given N engineers there will always be at LEAST N+1 strongly held opinions.
It's free advice and if you don't like it then you can always have your money back.