DLA Scotland Application Advice

Hi guys,
My niece has CF and her mum told me as I have MS I should be entitled to Disability Living Allowance. I didn’t think I would be entitled but my sis in law says it’s not means tested.
I work full time and would love to drop my hours as my PPMS is become more of a struggle, DLA would really help.

Some days I don’t feel so bad and I’m not sure how to approach my application.
Should I focus on the bad days? I don’t want to be dishonest and face the prospect of prosecution if my application is seen as fraudulent.