Hi Josephine,
It's great to hear you are planning to study the BSc (Honours) Health Sciences (Q71). When registration opens in March, you can reserve on your modules right away and then complete payment and registration later on. Alternatively, you can wait until you are ready to complete payment before registering. The deadline for payment and registration will be early in September (the exact date will be announced in March). Please be aware that if you reserve your modules early, your reservation will likely be set to expire in 6 weeks, so if you need further time you will need to request an extension by contacting Student Recruitment and Support. All our contact information can be found on the 'Contact the OU' page on the website: https://help.open.ac.uk/contact/.
If you are studying for career purposes, please ensure you complete your own careers research before making a study commitment.
Best wishes,
Neems