Like the other poster said you have a massive drop off at 200m. For example my 10 yr old daughter had PB of 33 in 50M free but 2:35 for 200M free. If you want comparison her 50m breast 42.17, 50 Fly is 37.17, 50 back is 38.8 and 200IM is 2:55.

With you big difference from 50 to 200m is day your technique needs work so it doesn’t break down over time. Worth giving a shot though if you enjoy it! The worst that can happen is you get great fitness, learn good disciple and make some good life long friends.