Talk to your clinician about adjusting exercise and daily routines rather than stopping or pushing through. Most activity you already do can usually continue, with contact sports, scuba diving and anything with a real fall risk as the common exceptions. If you are exhausted, scaling back is sensible and not something to justify.
Move to comfortable, non-restrictive clothing before you technically need to. Waistbands become intolerable long before maternity sizes fit, and stretchy clothes you already own will usually carry you through several more weeks. Comfort here is practical rather than indulgent, particularly when you are already nauseated.
Decide when and how you want to share the news, on your own terms. There is no rule that says you must wait for twelve weeks, and some women tell people early precisely so they have support if something goes wrong. Others prefer privacy for longer; both are entirely reasonable and it is genuinely your decision. InshaAllah, you can share the news in a way that feels right for you.
When variety feels difficult: A perfectly varied diet may simply not be realistic during a bad stretch of nausea. For now, staying hydrated and eating safe foods you can actually tolerate is the more useful goal.
Try different temperatures, textures and eating times to find what works. If your diet stays very limited, you are losing weight, or sickness is interfering with daily life, speak to your maternity team, because effective anti-sickness treatment exists and you do not have to reach a certain level of suffering to be offered it.