im wondering where you get your facts

From a multitude of scientific studies, as usual.
Not that ther ereally is a need for this because the statistics are openly available, but the studie generally compare to other countries, so it's a lot easier.

Just google!

Then you can find e.g. the following:

Only 4 percent of the world’s people live in the United States, but Americans make up a full third of the people worldwide who die by gun suicide each year.

Suicide is not the same as murder, but it follows the same rules: The less available, the less death (and since every other type of suicide is harder, there are less suicides).

Or how aobut that?

Guns kill twice as many kids as cancer does

Only cars kill more, and here we are talking about car country #1 in the world!

if someone obtained his license legally and shot people up gun control did not work
if someone obtained their gun illigally and shot a place up again gun control did not work

You have ifs there. We from IT call that a condition. So let's use common sense for a condition.

If (many) people cannot get a license legally, most of them won't get guns and wont shot people.
(Also there are less guns available illegally.)

If you cannot get your gun illegally, you cannot kill people with the nonexistant gun.

And no, "just get it illegally" is NOT easy if you are in a country with even moderately strict gun laws.
For example the last terrorist attack here in Germany (just 100km away from me) was done by a right wing nut attacking a synagoge.
He could not get his hand on "real" guns, so he used printed and self made ones.
Those failed after a few shots and he "only" could kill 2 people.