Set aside time for yourself and for your studies. During your dedicated study time, try to disconnect from distractions like social media, your phone, or television so that you can focus on what you really need to get done.
When I first started studying online, I found it difficult to focus and concentrate. I found it very hard to communicate my questions to my lecturers and more so, to understand what they are trying to communicate to me (especially between emails where LaTeX cannot be used). But you have the entire world at your fingertips. If the notes are not sufficient for your understanding, there are so many credible articles and readings online. Use your time and resources wisely. Maintain regular breaks to avoid strain, a quick break and walk outside can really revitalise you to continue studying.
It is vital currently to connect with others! Online portals, discussion boards and connecting with peers as well as teaming up for group assessments, staying in touch, and helping each other with proof-reading, tips, and exchange of resources. Use any of the student resources that are available. For instance, Stellenbosch University has an online library, SunLearn which offers resources for assignments. If you are confused about a course or have questions about an assignment, contact your Lecturer or post in the SunLearn forum. They are there to guide students in the learning process and they want to help students succeed.