One way you can master Blueprint’s is by practicing in a way that you really learn. You can look at a ton of tutorials some do line up and follow the exact same formula. It’s worth looking at multiple tutorials for the same technique or problem you are trying to solve. I tend to learn a technique and then start a new project and use what I have learnt with no help up until the point that I really need help. Blueprints are all about logical thinking which is why rehearsing something without help is vital to your development.
An hour of working in an organized way can go a long way. Also learn what functions/variables ect are available at your disposal and what they are used for. It’s about knowing what you need when you need it. You’d be surprised about the depth Blueprints can provide to a project.
Good luck on your mission.