[Knowledge Base Software] Create a tool for retaining large amounts of information

Hi everyone, I’m a 23F student and I genuinely need some advice regarding academics and productivity. I feel quite stuck and I’m hoping someone here might have practical suggestions. Firstly, I have a huge problem with retaining information. My subjects require remembering a lot of content — dates, places, chronology, names, and detailed concepts. It’s not the kind of material that I can just revise every other day easily because the syllabus is huge. I often understand things while studying, but later I feel like I forget most of it. I really want to know how people actually retain large amounts of information long-term. Secondly, I’ve been unproductive for a long time now. It feels like I’m stuck in a cycle where I know I should start studying, but I keep procrastinating or feeling overwhelmed. At this point, even starting feels difficult, and I’m not sure how to break out of this pattern and become consistent again. Lastly, I’ve recently started talking to a guy. I enjoy it and want to continue getting to know him, but I’m also someone who is very bad at multitasking. When I’m emotionally or mentally involved in something, it tends to take up a lot of my focus. I don’t want this to negatively affect my studies, but I also don’t want to completely cut off something that makes me happy. I would really appreciate some help.