Installing and Setting up OpenShot
Go to www.openshot.org/download/ and download the latest version for your operating system, which will be automatically suggested. After installing and launching the program, you can choose to follow the tutorial or hide it. You can go to Edit > Preferences to change aspects such as the language and general volume of the program.
Importing your files to the editor and adding them to the timeline
Click 
(Import Files), or go to File > Import Files to add your files to the project. You can also drag and drop them into the program from you file browser. They will all show up on the "Project Files" page. To add the project files to the timeline just drag and drop them on a track. To remove files from the timeline, right-click on them and click "Remove Clip".
Trimming, splicing and splitting
Right-click on a file in the "Project Files" page, then select "Preview File". There, you can choose where to start and end the clip that will be added to the Project files, then press "Create". On the timeline, you can hold left click with your cursor at the edge of a clip, and drag it to the moment when you want it to start or end. A simpler way to do this is to drag the red line above the clip, right-click, then select "Slice", and you can choose which side of the split clip you want to keep. Another way is to select 
(Razor Tool) and just click on the timeline where you want to splice a clip.
Adding animation to your clips
Right-click on an image or video file on the timeline and you can choose anything from the "Fade" or "Animation" menu. Fade can make your clip fade in or out at the start or end and Animation can add more movement to your clip, such as zooming in or sliding from left to right. You can set these animations to happen at the start, end, or constantly throughout the clip. You also have the option to add a random animation to your clip.
Keyframing
Right-Click on a clip and select Properties, which will open up a menu where you can see all the attributes of your clip. Modifying any of the attributes anywhere on the timeline except the start of the clip will add a keyframe, making it so it will be animated to change from a set of properties to the other between ketframes. Built-in animations like Fade automatically add these keyframes. You can right-click on any property and choose the type of transition between keyframes, such as Easing in or out, and remove or add another one.
Adding Effects and Transitions to your clips
Go to the "Effects" page and drag and drop any effect on a clip to add it. Effects have separate properties and you can also add keyframes to them. For transitions, the simplest and safest way to add them is to drag and drop a clip on top of another one, which will automatically insert a "Fade" transition between them, but you can also add transitions to the timeline from the "Transitions" page. Note that a transition in OpenShot is just a PNG that is only black and white, so you can easily add your custom transitions to the files and use them in the editor.
Exporting your finished video
Click 
(Export video) or go to File > Export Project, then choose the file where you want your video to be saved, the file format, the video quality and frame rate, as well as the general quality. Click "Export Video" and your video will start encoding. After it's done, your video will appear in the file you chose to save it in.