IELTS 4.0 to 6.5 in four months

I took the IELTS course for four months in 2019, before going to study in Canada. My mock test on arrival was 4.0 (L 3.5 · R 5.0 · W 2.0 · S 4.5), my mock test after four months was 5.5 (L 6.5 · R 4.5 · W 5.5 · S 6.0), and in the official test I sat after going home I got 6.5 (L 7.0 · R 5.5 · W 6.0 · S 7.0). In the first month my score did not move at all and I was worried, but it went up a lot in the fourth month after I kept at it. Writing is hard to raise on your own, but going through homework and classes again and again, I slowly got the hang of it. The teachers and my friends were all serious about English, and I learned not only IELTS technique but also how to make my own decisions.