Marksmanship isn't just about "tips".
A person needs to devote themselves to learning &
properly practicing the fundamentals of rifle shooting.
While the basic lessons seem simple enough to
understand with a few hours of instruction, gaining true mastery can elude
someone for their entire lifetime. Don't be discouraged. It's a journey that's
worth every patient effort and one that requires a lot of "hands on"
experience.
I'm going to give you several links to more
information to get you started. Some of it may translate directly while some of
it will have to be adapted to your situation.
A Rifleman will know how to use the bone structure of
their body to support the rifle in several shooting positions. They will also
know how to practice "breathing control" and to properly squeeze the
rifle trigger. They'll know a lot of other things too, but the links I provided
discuss it in greater detail.
P.S. The No. 08 .22 caliber training rifle should be
capable of shooting better groups. I would expect it to be capable of shooting
groups of 3/4 of an inch or smaller at 25 yards.