I am a mummy who just turn 40 this year and my work contract just ended. Is it true that at this age difficult to find a new job especially something that you like and higher pay ?

l don't think so. Although many jobs must has minimum education or certification required in the market nowadays, but most of the jobs still want to get new staff with work experiences. You may look out for contract job as previous time in your prefer work areas which is suit to your interest.