I often make video cuts for presentations or promo videos, so I can recommend some really good software for a beginner. Perhaps you have already heard about Movavi products for editing multimedia and graphic files? If not, I advise you to visit this website
https://www.movavi.com/ . I'm sure that here you will find not only free functional editors, converters and other programs, but also many useful tutorials for beginners on creating unusual effects, on using professional tools for creative design.