With being in the YouTube game for a few years now and having used a few different video editing software packages I hope this roundup can help you with your editing!
So due to the excellent DaVinci Resolve having a free and paid tier im going to split this a tad differently and give a few options for PC and Mac!
Best Free for PC - DaVinci Resolve litteraly is incredible and has everything you could ever want, but it does have a bit of a learning curve as this is the software that is used by professionals making big budget Hollwood movies, I'd recommend either sticking with this and learning, taking your time or start with something which is simpler to get you into the groove of basics of editing! This is the software which I currently use for most of my videos.
Best Free for Mac - Every Mac comes loaded with a copy of iMovie, which is a fantatic basic video editor and where I started my editing journey learning the basics of chopping up a video file, its also pretty powerful once you figure out everything it can do so if your on mac, and want to get started id recommend you start with iMovie. This is also a great backup which I use when I want to edit away from my main setup or on the go! (well i did until my MacBook died on Monday night RIP MacBook... let the saving up for a new one commence)
Best Paid for PC beginner - I am going to throw in Wondershare Filmora, I used this software for a few years as it was a great price with a lifetime update package for like $50 or something so you always get the latest version and its so simple to use and has some nice user friendly pre-made effects which you can easily use to add a little bit more flair to your videos. Also it can use your GPU for super quick render times.
Best Paid for PC Pro - I'd suggest paying for the full version of DaVinci resolve, whilst it doesn't get you a lot more features than the free one it allows you to utilise your GPU for your video editing and rendering which can make a huge difference if your editing really large files which would strain most CPU's! (I will be upgrading when I can afford too and also get some dedicated editing hardware for my setup which they sell on their website like a speed editor keyboard which looks great)!
Best Paid for Mac - for this I think there is only one option to go for which is Final Cut Pro. This is a great next step and can almost be thought of like as being the Pro version of iMovie. Also much of the basics which you learn on iMovie can be easier transferred over to Final Cut so you are not starting at square one as they are both from Apple! With the software being created by Apple, who make the hardware you will be running it on it makes the most of your hardware for a great editing experience!
I hope this helps any of my fellow creators and any questions fire away!
Murray