Anapanasati with Dhatu Manasikara

In Maha-Rahulovada Sutta monk Rahula asks the Buddha for instructions on developing Anapanasati. The Buddha didn't directly give instructions to him of Anapanasaati but instead, gives instructions on developing Anatta on the earth property, the water property, the fire property, the wind property, & the space property. > "Rahula, {any form whatsoever that is past, future, or present; internal or external; blatant or subtle; common or sublime; far or near: every form is to be seen as it actually is with right discernment as: 'This is not mine. This is not my self. This is not what I am.' There are these five properties, Rahula. Which five? The earth property, the water property, the fire property, the wind property, & the space property." It also states developing the **four Brahma Viharas, the perception of Unattractiveness and Impermanence.** After that only the Buddha gives instructions on **Anapanasati**. I also have heard that for the people who are untrained in Anapanasati, they may meditate on the elements and then go to Anapanasati. (Some say it is better to do this way since not doing Anapanasati properly can lead to difficulties in the mind) PS - I tried the above approach and it was somewhat smoother than directly going into Anapanasati. **Q1.** Is doing Dhatu manasikara first and doing Anapanasati afterward a smoother and an effective way of doing Anapanasati? **Q2.** Also, can I know the simple explanation of what these actually mean > I will breathe in calming bodily fabrication. > > I will breathe in sensitive to rapture. > > I will breathe in sensitive to pleasure. > > I will breathe in sensitive to mental fabrication > > I will breathe in calming mental fabrication. > > I will breathe in sensitive to the mind. > > I will breathe in satisfying the mind > > I will breathe in steadying the mind > > I will breathe in releasing the mind > > I will breathe in focusing on inconstancy. > > I will breathe in focusing on dispassion. > > I will breathe in focusing on cessation. > > I will breathe in focusing on relinquishment. What do these mean and how to achieve this is Anapanasati?