Don’t stop saying the formal words, but also, say your own tefillos. We women especially, even if you’re not at the point of having lots of family obligations, specialize in informal prayer. (Men too can and should try it; it was after all a man, Dovid Hamelech, who said, “Vaani sefilasi.”)
And daven for others. Say tehillim and techinos on a regular basis. And don’t forget to say Thank You to Hashem as often as you can.
And you’re not the only one in this boat. I don’t know how many “regular” people are on 100% all the time. Rebbetzin Jaegar said something phenomenal on the Rochel Imeinu yahrtzeit video this year. She said that she asked her father for davening inspiration after she had kids and her davening experience just seemed to have plummeted. Rabbi Freifeld, zt”l said on the words of Yishtabach, HaBocher b’shirei zimrah, that it can be translated as Hashem Who chooses among the “sheraim” of song. Even if your tefillos were less than inspired, that is something very close to Hashem, He picks and chooses those very sheraim.