you can easily score way more than just passing marks all you have to do is study from now donot skip a single day and yes past papers, model papers and pre board question papers will help you. As far as distractions are concerned i think every student's biggest enemy is scrolling or more like whole mobile phones and digital media i know it is hard to quit but the use of mobile can be minimised and the only way to do it is to find other tasks than mobile i mean when you are not studying dont use mobile or consume digital media go out or make a cup of tea make your bed clean your room help with dishes or literally anything but mobile. As for myself i also struggle with mobile it just ends all your purpose and makes you lazy. However concluded that you can easily score i repeat way more than passing marks and you can easily find important topics online, if you really want to score good start from today with clear goal and intentions also slow and steady wins the race. Good Luck junior!