Yes to being a clergyman just being a respectable career for a younger gentry son with no need for undue religious faith. Austen would have thought that the evangelicals later in the 19thc were fervid and ungentlemanly. We're clearly supposed to think of Edmund Bertram in Mansfield Park as doing all that could be required by actually planning to live in his parish, visit the poor, and preach his own sermons, rather than hiring a curate to do the donkeywork and continuing to live and hunt at Mansfield, as dashing, amoral Henry Crawford thinks he will.
And to whoever asked about breastfeeding for women of Jane Austen/Charlotte's social class -- wet nurses were usual. We know Jane Austen's mother nursed her at home for a few weeks, possibly because of the weather, then sent her down to the village to be nursed there, visiting her regularly but only bringing her home again when she was about 18 months old, like all the Austen siblings.
Jane's disabled brother, George, was never brought home to live when it became obvious he wasn't developing normally, but was sent to live with an uncle, Thomas, Leigh, who had some unspecified mental or physical health issues and was unable to live independently, under the care of a family in another village.