Newbie question: staying calmly behind glider tug

I'm planning to join the local soaring club and had my first ride last
weekend. I was eager to take the controls while being towed and was
enormously humbled by the experience.

I've had my ppsel for several years, but do not have many hours under
my belt. Never the less, I was looking forward to this and thought:
How difficult could it be? No P factor, just hang in there behind the
tug.

I was embarrassed. I could not keep the glider (a Blanik) anywhere
close to remaining calmly behind the tug. I was all over the sky and
was acutely aware that I must be yanking the tug's tail back and forth
and up and down.

Three times I was rescued by the guy giving me the ride, although by
the last time I was beginning to understand that the tow rope itself
could bring the nose back.

I had not prior instruction before the ride, I really thought it would
not be a problem. BZZZZZT wrong.

Once we cast off, holding headings, holding airspeed and just keeping
the wings level wasn't a problem. I was astonished at how far we
could travel at 60 mph without seeming to loose much altitude. Heck,
I've lost more altitude than that when I was flying cross country and
TRYING to hold my cruise altitude. :-)

One of the more expert glider pilots reassured me that all first
timers have the same problems, and told me that I should concentrate
on holding the wings the same as the tug, and using the rudder to stay
behind it.

I wasn't doing it that way, I was sawing back and forth with the stick
and getting into all kinds of trouble.

I'm eager to try again, but I thought I'd drop in here and ask how
folks stayed behind the tug... If you all can remember back when you
were at my stage. ;-)

Thanks, Corky Scott