Even if you aren't technically pregnant, you can prepare for this journey by following as mentioned below for a better start on this journey.

Fill up on the follic acid

Enquire about your meds to your doctor

Find out early pregnancy signs

Shop for pregnancy tests

Brush up on your pregnancy hormone knowledge

Check for signs of ovulation

Source: https://www.whattoexpect.com/pregnancy/week-by-week/weeks-1-and-2.aspx#:~:text=You%20may%20not%20technically%20be,prenatal%20diet%20and%20exercise%20routine.