@Tree543 we are just back from our trip so here is what I’d recommend and what I’d avoid, based on our experience.
Absolutely do go to Point Du Hoc, the US cemetery which has a superb free museum (DH reckoned it was the best of the bunch), the Overlord museum near the US cemetery and Omaha beach. The airborne museum at St Mere Eglise was also excellent, a real immersive experience and very well done. The newish UK memorial above gold beach was a lovely spot too.
Consider going to the Bayeux tapestry and get a combined ticket with the ww2 museum. Tapestry is a little underwhelming but still good to see and the war museum had lots to see. Bayeux is lovely compact town for a wander round and there’s a big market on Saturday morning.
Dont bother with the new beachfront museum at Arromanches, it was so busy and has a very poor layout so we felt we didn’t see much or be able to read the blurb about the items. They had nothing dramatically different to anywhere else so if you were going to skip one, this would be the one I recommend. Arromanches itself is worth a visit though, it’s a lovely wee village and there’s a beautiful memorial up on the cliffs to the east of the town and a great view out over the mulberry harbour remains.
We didn’t go to the Normandy Victory Museum at Carentan and in hindsight I wish we had as their website suggests it’s coming from a more French perspective, which would have been good to see.
We had a great time overall, good food, nice weather, lots to do. Enjoy!