How to find books on math \ sys.administration?

Question

IT education

Welcome all.
The situation is as follows: I am a schoolboy who has completed nine grades and is currently finishing the tenth.
Nine graduated barely, especially badly with mathematics \ physics \ chemistry etc.
In the future I want to connect myself with IT. The choice is between a sysadmin and, most likely, a coder.
I understand that I need to know mathematics better, so I want to ask a few questions.
First: please advise any books on mathematics FOR SCHOOLCHILDREN , preferably step by step. School textbooks are categorically not suitable, at least those that are now in schools.
Second: recommend books on networks(I mean everything related to this - protocols, DNS, IP and other wisdom (maybe I still know what it all means, but I haven’t read any books, so I can’t vouch for knowledge of the terms))
Third: how to understand what to choose from other educational institutions that are associated with system administration? I looked, I didn’t find anything, since the names are very, very generalized. How to understand that it is at this (faculty?) I will learn what I need?
Thanks in advance.

Answer 1

In the future I want to connect myself with IT. The choice is between a sysadmin and, most likely, a coder.
I understand that I need to know mathematics better, so I want to ask a few questions.
If you want to be a coder, then you don’t have to, especially for a system administrator. If you want to become a programmer, then at least this is a school course, all that is needed above for special areas like game development, AI, search algorithms in Yandex / Google, etc.
Tanenbaum and Olifer
No one will teach you, be prepared for the fact that you will have to study yourself and a lot. If there is a good teacher at the university who will not teach you how to code shit, consider yourself lucky)

Answer 2

"I barely graduated from nine, especially badly with mathematics \ physics \ chemistry, etc.
In the future I want to connect myself with IT. The choice is between a system administrator and, most likely, a coder."
Why do you need to associate yourself with IT, if it's so bad with studies? Do you really think that in IT you just need to read a couple of books and everything will go well?
IT is evolving all the time. Curricula and textbooks for modern IT become outdated too quickly, so no one will teach you, you need to do everything yourself. And you can't even find the basic books yourself.
Even for a freshman who can be hired, you have to learn more than for the whole school. Do you really understand what modern IT is?