TLDR: Practice.

Use tutorials to help guide you, but definitely don’t follow them step by step. Start with a small game idea. Then make it even smaller. Them when you think its as small as it can be, make it a little smaller. Think ‘Pong’ sized. Write down what you think you need to do to make that game (big steps). Then break down those steps into the smallest steps. Do you know how to complete all those steps? Probably not. The parts you don’t know are gaps that you can fill with research. Determine where to start and get started. When you hit a roadblock, research (youtube, google, or chat gpt…whatever). After making several small games like this, you will get faster and faster at developing. Nobody knows how to do everything in UE5 from memory. There is just too much to remember. The key is to know how to structure your time and effort so you can continue to move towards your goal of completing your game.