You do not need a profile written as if you were twenty-five. Say what your life is like now. Children, work, and a previous marriage are ordinary facts, not something to apologise for.
Be specific about time. People in their forties and fifties usually have less of it, and a message that suggests a real plan is easier to answer than an open-ended chat.
Only Dating is free to join and free to message, so you can take the conversation at your own pace. There is no paid boost that puts a stranger at the top of your list.