Physics can be difficult if no effort is made to learn it. You will need to make continuous efforts. Before doing numericals start by learning theory thoroughly.
Visualize Physics -
When you study a concept and visualize the possibilities, creating mental pictures of it can really speed up understanding.
Try to assimilate the tutorial material in small chunks. Stop and think about what you read. imagine and drag on a paper.
Understand the derivation of important equations -
Often the derivation itself provides a lot of clarity about the topic and the numerical problems you attempt.
Learn to break down a numerical problem -
Drawing neat diagrams and keeping all the available information around them can help speed you towards writing the correct equation and therefore the answer.
Be disciplined about not "rushing" when solving a numerical problem. In other words, don't jump steps when doing a problem.