First swim meet in 35 years

Good for you!  I also had a 35 year break from swimming.  I timed myself during workouts to get an idea what entry time that I should use for each event that I wished to swim.  Obviously my time in a workout was going to be faster than in a meet but that is where I started.  One thing that I suggest is that you should get some work off the blocks if you can because the blocks looked much higher than what I remember and made me uncomfortable.  By the way my first USMS meet was in February 2016 and I am still at it.  Good luck.  

Good for you!  I also had a 35 year break from swimming.  I timed myself during workouts to get an idea what entry time that I should use for each event that I wished to swim.  Obviously my time in a workout was going to be faster than in a meet but that is where I started.  One thing that I suggest is that you should get some work off the blocks if you can because the blocks looked much higher than what I remember and made me uncomfortable.  By the way my first USMS meet was in February 2016 and I am still at it.  Good luck.