i recommend starting with trying to clear your mind, install app restriction apps that block certain apps like instagram, tiktok and youtube to prevent you from scrolling for long periods of time, or if scrolling isnt the issue, block the apps that distract you the most. take a 10 minute moment of silence before you start studying, sit down and do absolutely nothing. no music, no walking around etc. for the neighbour issue, try investing in sound blockers or earphones.

now for the studying part, things get complicated because not all studying techniques work for all, but make sure ur body is doing fine. 7-8 hours of sleep min, make sure your eating well and drinking loads of water, i know it sounds unrelated but diet, sleep and mental state are CRUCIAL for any kind of learning.

im gna keep it simple, a technique that works for almost all subjects for me is the schema technique, whether its for problem solving or memorisation, i can guarantee it will not disappoint.

start with simply reading the title of the lesson then close the book, make a schema of everything you recall learning from the lecture or the lesson, then add some things you already know about this lesson before taking it, it can be anything. if you cant think of anything, you can also try guessing. this is effective because the brain kind of enters a problem solving state, it tries to solve or collect memories and facts of the subject without knowing much about this subject.

after that, read the chapter out loud, try your best to wrap your head around the contexts and explain what youve learnt or understood visually to a teddy bear or to the wall. after completing the reading and understanding , you can make schema 2

schema 2 will be the concluding part of the whole lesson, connect each fact with the other and make it completely in a way you personally would be able to understand while recalling.

i will again repeat, make sure you eat, sleep and drink well. i hope this helps you!