Young or old you will hope to get a good pension one day. But you cannot expect everything just to work out. Mistakes do happen. Particularly if you change jobs payments for your pension might not get paid into your account. No matter how young you are you need to check every year that your pension fund is accurate, mistakes have happened and more will.
Pension statements used to be posted out but that has stopped. You can check your details at https://www.teacherspensions.co.uk/ If you have forgotten passwords etc the site shows you how to get them back.
The NUT also has very useful information on its website: https://www.teachers.org.uk/pay-pensions-conditions/pensions
Pensions do not have to be a future nightmare.