Welcome! Nice looking X judging from the pic.

The fact that your family has a history of BMW's, you're probably aware that they need a bit more attention than the average car.

That being said, there are a few things to check: Again, the cooling system on these are notorious.

The front suspension parts seem to wear quickly, and once one starts to go, the others quickly follow unless caught soon. Any weird clunks or clanks should get looked at immediately.

Front CV's also seem to wear quick. Try to avoid turning the steering wheel all the way to the steering lock (when the wheel stops turning) as much as possible.

Aside from that, I would just enjoy it, and know that there will always be a spot of maintenance ahead.