Congrats, 91 is a good score for a first registered tournament. It's been way too many years (some time in the mid 70s) for me to recall exactly but my first was either a 92 or a 94, most likely the lower of the two. I'd already shot several 25 straights and a few 50s prior to that in practice. The first is always a nice event and that first 100 even nicer.
These days even 25 straights are hard enough to come by for me. What once seemed easy has gotten more difficult after my long lay off.
What equipment are you using? I began with Remington 870 Wingmasters, moved to Rem 1100s, then Remington 3200 with tubes and then to all sorts of things from there. Now I shoot Browning O/Us. I sure wish I'd kept that Belgian made three barrel set (20, 28 and .410) I was using when I stopped shooting competition but a dealer wanted it more than me and offered me a profit on it so I let him have it.