Booking a massage means lying on a table, partly undressed, with someone you have not met. Looking at the room first is a reasonable thing to want and nobody will find it odd.
How private the treatment room is and whether you can hear reception from it. How warm it is. Where you would change and whether there is somewhere to put your things. Whether the table has a face cradle you can actually breathe through.
How draping works — what stays covered and when. Whether you can ask for less pressure mid-treatment and how to do it. Whether somebody is within call. What happens if you want to stop.
Those are the questions that make a first appointment comfortable, and they are much easier asked standing up and dressed.
No treatment, no assessment, no advice about a health problem. If you describe something, the answer will be to book properly or to see a doctor.
And no pressure: nobody will ask you to book before you go, and nobody will follow up.
Ring or ask at reception and we will find a quiet time.