Hi Melanie
Welcome to the forum.
Your forum name appears to be your real name, I would advise you to change it to protect your anonymity. See
www.benefitsandwork.co.uk/guides-for-claimants/faq/forum You need to get advice from your local Welfare Rights Organisation;
advicelocal.uk , they will be able to help you to apply for UC, have you received the invitation letter from DWP?
Before you do anything seek advice, you will both need to make a claim separately, which are then joined, you will both need to sign a claimant commitment, if you are in the support group then you should be placed in the LCWRA group when you apply.
Gary