Trying to lose weight

Hey guys, so according to my BMI I'm "obese" and I definitely need to get my butt into gear and lose weight. My husband and I are trying to conceive and I know lowering my BMI will help with that and it will help solve my NAFLD (non-alcoholic fatty liver disease). But I just don't know where to start. I work a part time job but it's still 4-5 days a week and 8 hour shifts. I work in retail so I do a lot of standing and walking and by the time I get home I'm exhausted. Is there any tips of what I can do to start and make this adjustment easier?