Learning online is a different way to learn than most of us are used to. If you are not comfortable with the tech, ask your teacher and classmates some questions. Learning new ways to study can help too. Learning how to be patient with ourselves, sticking to a schedule, and asking for help when we need it can all make a difference.
A good place to start is to make a schedule that includes your school schedule but also time for breaks to eat, to move your body, to chat with friends and family, to do homework, and to have fun. Other ways to make online learning easier is to find a quiet, uncluttered space to work and to organize your school materials at the end of every day. There are other tools that can help.