I moved to the US, settled down, got a job - I guess it's time to
resume training :-) The question is - are there any formalities to be
done before I can fly? Medicals, student pilot certificates, anything?
Or do I just call any gliding school, make an appointment, show up and
fly?

To clarify - I am talking about flying with an instructor. I soloed
last year, but haven't flown since, so I guess I am pre-solo again.

Thanks!
Bartek