Yes, if you want to repair your MacBook yourself, then you can. But the condition is that there must be some minor problem with your Mac. So first you should know about the problems and identify them, whether it is in your control. If yes, then fix it yourself. This will mean that you will not need to spend money. But there are so many problems that you cannot fix them at home. Like if the Mac breaks down, waterfalls on it. Screen damage, etc. Here, take your Mac as soon as possible and go to the Apple Store.