Hello,

You shouldn't make your past as a parameter of your ability for today or even future for that matter, just because you haven't scores well in previous year that doesn't mean you cannot well now, what you need is firstly good amount of self-belief in yourself, so have a positive mindset and attitude, this is very important for any kind of success in life, and be focused, dedicated towards your studies, what I mean is it's not that you have to study for long hours, if you're not used to it you will find it difficult to do it at first, but you must remember one thing that even if you study for one hour or two hours, do it with full focus and concentration without any distractions, another important thing is be attentive in you class, whatever your teacher is teaching you,  in case you have any doubts reach out to them, I'm sure they will be more than willing to help you out, rest if you still feel guidance then you can go for tuitions, today with the surge of digital media there are many YouTube channels as well to help out with conceptual clarity, you can search your queries regarding this here, you can go through CBCE Term 1 sample papers by visiting our page at https://school.careers360.com/articles/cbse-class-10-sample-papers, this will make you acquaint with exam pattern, marking scheme, important topics  etc.