Unless you are a gifted illustrator, hire an artist (or partner with one) to ensure that you have professional illustrations for your book.
For picture books, 32 pages is the industry standard length. If you want to do something different and sell your own books, that’s fine, but if you’re hoping to get a publishing deal, stick to 32 pages.
Join a book writing society like SCBWI and bring printed copies of your book to their national conferences. You just might meet someone who can help your career!