you can expect them to (not always, just going off mine)
- measure bub
- record heartbeat
-check organs (stomach)
- check nuchal fold

some ultrasound ppl do tell you some info but some dont. depends on the person and the rules they have to follow iykwim.

the 12 week scan is great u will be suprised how much u can see.

You can announce your pregnancy now if you wish, making it to the 12 week mark is great as the risk of misscarriage is reduced.

HTH