Hi Nima0041,
You can start by checking out the YouTube Playlist and seeing what interests you the most.
If you want to delve into Blueprints without knowing how to code you can look at this video Blueprints Intro which will give you the run down of the basics.
Users have compiled a list of community created tutorials as well that will give you some basics on creating some of the things you would like to as well! News Weekly Community Tutorials
If you’ve subscribed and downloaded the engine you’ll find that there is a host of free content examples and games available on the Marketplace. We have basic templates available for common game types for you to build your games off of and these are being updated regularly with new one. The most recent being our Vehicle template. The free content on the Marketplace is free to use in your own games as well!
If you have questions you can always ask here on the forums, use AnswerHub, or search by using Docs.UnrealEngine (the last is a very powerful search because it will search all of our sites for the keywords you type in and you can choose to only look at any one of those sites individually for information as well!)
If you have any other questions or need help let us know!
Thank you!