Hey Kamil,
Welcome to the forum! 
We don't encourage asking multiple questions in the same thread. In future please try to confine the scope of your questions to individual topics.
As for the rest – please spend some time searching the forum before asking basic questions.
People are friendly here, so don't hesitate to ask for help if you need it.
- Search the forum, before asking questions.
- I usually try the forum search and do a Google site-search.
- Don't bang your head against the wall.
- If you can't find something promising within a 10-30 minutes then ask for help.
- Don't bang your head against the wall when creating macros either.
- If you fail to make progress for 20 minutes to an hour it's time to holler uncle and ask for help.
- On the other hand – people who are new to Keyboard Maestro have a lot to learn and many want to run before they can walk.
- Look at and experiment with KM's default macros.
- Search the forum and play with macros you find interesting.
- Remember to use the search field in the help menu of the Keyboard Maestro Editor.
- Examine the menus of the editor carefully, so you get a feel for what's there.
- Especially the insert items in the Edit menu (note the keyboard shortcuts).
- Look at the sort and select options in the View menu.
- Hold down the Option key when perusing the Edit menu to see help links to the Keyboard Maestro wiki.
- Be aware of the Wiki as a resource.
- Take a look at this guide if you haven't already:
Take Care,
Chris
(Keyboard Maestro Moderator)