Graduated back in April, but I put off doing a parkrun for months, my first one was 4 weeks ago and I really enjoyed it.
Since then each week I've done a new PB which I'm amazed at - I really enjoy the parkruns so to anyone who's a bit scared or apprehensive about doing one (as I was) I would say, just go for it, no-one cares how anyone else looks, how fast/slow they run, it's a very friendly environment - I should have done it weeks ago!