Complex sentence: Once home, he begins to quickly become restless and realizing that his retirement is kind of boring, as he has nothing to do with his life to do, before his wife persuades him to go and see about claiming a pension.
Split into simpler sentences: Once home, he becomes all to quickly restless and realizes that being retired is kind of boring, as he has nothing to do. Eventually his wife convinces him to go and see about claiming a pension.