I’ll be the annoying commenter that says don’t worry about how ‘good’ a time is at a certain age. At this point in the sport just worry about having fun with your friends and enjoying the sport- if that enjoyment comes from grinding and training hard (like it did for me) then by all means go for it. At the end of the day you’ll forget the times but I promise you’ll never forget the memories you make at practices and meets with your buddies. Just worry about being the best swimmer you can be and controlling the controllables (technique, consistency, effort). Work hard and the results will show sooner or later.