How do we finish things? Like I usually have a problem of finishing reading a book,after some time I get bored and just stop reading and completely abandoning the book. This also goes for everything else like trying to learn something.
Unfortunately your motivation to finish things is strongly influenced by the neurochemical balance in your brain. Some people suffer from conditions like ADHD or bipolar disorder which makes it extremely difficult for them to work on projects and have the motivation to go through with them. The only solution for such people is getting the right medication.
Stimulants like caffeine can help increase motivation, so you can try drinking coffee. But caffeine should be avoided after 2 PM because having it later than that will affect your sleep and decrease your motivation the next day.
You will also find many articles online on how to increase motivation and avoid procrastination, although personally I am highly skeptical of the solutions they offer. One thing that can help however is exercise; spending 30 minutes doing cardio exercise (such as on an exercise bike) and this can enhance your desire to read and get things done.