>>24564273 (OP)Don't be afraid to read children's books. Ideally by the age of 18 you should already have read six hundred children's books and three hundred books for adolescents, or whatever it is. You haven't, so you have a lot of catching-up to do.
The trouble is that many of the children's books which would have strengthened your reading ability are now not right for you emotionally. It's a problem but not an overwhelming one. Firstly, many good children's books are OK for adults too. Secondly, there are plenty of good-quality "light" books aimed at adults which will do the strengthening job and still suit you emotionally.
"Good-quality" doesn't correlate much with "difficult". There are good easy books, bad easy books, good difficult books and bad difficult books. You want the good easy books first. Then good difficult books.
SOME CHILDREN'S BOOKS WHICH YOU CAN PROFITABLY READ FOR THE FIRST TIME WHEN YOU ARE OLDER:
Ted Hughes โ The Iron Man
Laura Ingalls Wilder โ The Little House In The Big Woods, etc
Charles Kingsley โ Tales of the Greek Heroes
Roald Dahl โ Fantastic Mr Fox, Danny The Champion Of The World
A. A. Milne โ Winnie-The-Pooh
Tove Jansson โ Finn Family Moomintroll, etc
Robert C. OโBrien โ Mrs Frisby And The Rats Of Nimh
C. S. Lewis โ The Lion, The Witch And The Wardrobe, etc
Lewis Carroll โ Alice In Wonderland
Scott O'Dell โ Island Of The Blue Dolphin
Rudyard Kipling โ The Jungle Books
Wilson Rawls โ Where The Red Fern Grows
Kenneth Grahame โ The Wind In The Willows
Mark Twain โ Tom Sawyer
Robert Louis Stevenson โ Treasure Island
Richard Adams โ Watership Down
The basic rule is always: READ THE BEST BOOKS YOU ENJOY.