I find it easy to get lost in new topics. Sometimes I feel overwhelmed with everything that I have to do. Here are some of the tools that I use to keep myself on track.
I've been using the pomodoro technique for a couple of years now. It really helps me focus when I'm feeling overwhelmed with tasks.
The Pomodoro technique involves working on one task for 25 minutes and then taking a 5 minute break. After 4 cycles you take a 30 minute break.
Anytime I am feeling unproductive and feel like I can't get started, I start a pomodoro.
I started using toggl to track my time and the browser extension adds pomodoro timer functionality.
Time tracking with toggl is nice because there is a weekly email that is "proof" of your work. Having this proof is a good motivation tool for me.
Pages in Notion can be used as a wiki like structure for notes. I have a page that links to all of the classes I've taken notes for and each of those pages holds a page for each lecture, a page for each chapter and pages for study guides, which you can see an example of below.
Notion has toggles that let me write a question and show/hide the answer. This is a form of active recall studying. I also use colors to mark questions and areas that I had more difficulty answering.