As you know, this kind of software (as well as Adobe Premiere) can be very complex and can't be mastered without plenty of patience and effort. However, if you're going to download the program and you're only a beginner, you had better get hold of a tutorial. If you want to make use of all its functions you'll have to pay its price, over 300 euros, because there's no such thing as a Pro Free option. You can check it out for yourself by downloading the trial version that you can use 30 days for free, with a few restrictions. We've already mentioned the redesign that has led it to offer better results thanks to the optimization of workflows and the program's better performance. There's no doubt that Final Cut 10.3.4 is better than any other version, including Pro 7 (although this one does work on Yosemite).
Update to Final Cut Pro X 10.1 10.2.3 libraries - Apple Support.