If you were to do so professionally, the best idea is to keep taking vocal lessons or have a vocal coach. Even the greatest teachers still have consultations with others as vocal coaches to check on their voice, see if anything has changed, or if they lack technique etc. The voice will always keep changing through puberty possibly until late 20s early 30s which makes pitch sink lower. Vocal coaches not only teach and remind the vocalist of proper technique, but also adapt to those voice changes so you could be singing regularly. Besides, there is always something new to learn when it comes to voice lessons (straw technique, Gregorian Chant, whistle tone, etc.).