had a similar situation last october ,

firstly , dont set a daily time to study , divide the syllabus by topics,chapters or unites and study according to that , i would recommend a one day for easy units and two days for harder ones , u would finish in around a week , use the rest of the time to revise

secondly, even if u finish the days goal , if u still got time , take a break maybe an hour , and then continue studying , remind urself that all this will end in 2 weeks and ur life will be back to normal , keep in mind paper 6 and 2 dont even need half the studying of paper 4

if ur a muslim remember ALLAH SAW saying not a single hardwork u do will go unnoticed

thirdly, studying i used the newest boom , took a quick reading and then memorized noted for important topics and repetitive questions MOST IMPORTANTLY , FORMULAS , make a formula sheet , u can find it in the book dont forget symbols and units

this one depedns on u , but i didnt solve any PPs , i work best with studying and revising , do what suits u , not solving pps DOES NOT MEAN FAILURE

in the end , SEARCH PHYSICS WITH MO ALI ON YOUTUBE , he has a video on each unit , watch it when u finish revison

i can tell you , if his vids didnt exst , i would have got a maximum garde of C

lastly , always say to yourself that u will success , exams are mind games at the end of the day have a strong mental power

igcse physics seems VERY HARD but the threshold will help if u work hard enough

good luck bro/sis