If you take full advantage of these last ten nights and then after Ramadaan you are consistent on your praying five daily prayers in congregation along with other ibadahs then you can say you are moving towards attaining Taqwa.

https://www.assimalhakeem.net/what-is-the-taqwa-we-should-get-while-fasting/

How am I supposed to know if I gained taqwa this Ramadan as the whole purpose of the month is to gain taqwa? Alhamdullilah I am confident that I can do more ibadah after Ramadan compared to before Ramadan. But I’m not sure how much my heart changed. It goes up and down. Should I use my amount of ibadah as a gauge to measure if my taqwa went up or should I look at my heart?