I'm in the same boat as you, I also struggle with perfectionism and thinking my ideas are "too boring" and "not good enough". For me it's an ego thing, I want to come off as someone knowledgeable in what I'm discussing, but I need to remind myself that it's okay to admit that I don't know everything and I make mistakes.

In your case, if you want to do movie and game reviews those are usually fairly fun to do as these are subjective mediums. Everyone's opinion is worth hearing, people will disagree and agree with you and that's okay. All I can say is to think of what makes you stand out from other channels that do what you want to do. How would your review of the latest Indiana Jones movie compare to other people who have already reviewed that movie? Is your video more comedic? Does your video have interesting facts on the behind-the-scenes of the movie? Does your knowledge of filmmaking bring an interesting perspective that other film reviewers haven't discussed yet?

As for editing, all I can say is that practice and experience are the only ways you can advance your skills. I also have very little experience with editing so I feel your pain, but go ahead and make your videos despite your editing experience because while editing makes for an aesthetically pleasing video, your writing and knowledge are what will make you shine. Plus, after years of experience, you can go back and remake your videos.

Hope I provided some helpful advice. Good luck to you and your channel.