If you're not sure about what to get ready then it is no problem, your adviser can help when you meet.
Your adviser will look at your financial situation as a whole so they can see how everything fits together and the impact of one area on another. For example, if you take money from your pension in a certain way it might push you into a higher tax bracket and affect your annual allowances.
And it's yours to keep, no matter what you decide to do. If you'd like to go ahead your adviser will start putting the plan into action for you and explain the next steps.