Biscuit saw that Jack was done so she started to explain
"Now let me explain about nen first in order to Master Nen, one must first learn and master the Four Major Principles. The Four Major Principles are Ten, Zetsu, Ren, and Hatsu after that she started to explain various things about Four Major Principles".
After that he started practicing four major principles. for a month he practiced daily and his foundation is very solid. Biscuit also started to adapt and started to getting less shocked seeing he already mastered Four Major Principles she called him and said
"Seeing you already mastered four major principles Now we will check which nen type you belong to"
Jack already know but still he asked her, "What do you mean Type ?"
"What kid do you think you can lie to me i was lying even before you born"
"tch old hag" jack said in low voice but Biscuit still heard him and punched him send him flying with tik mark on forehead. After some time jack come back and said "Sorry" seeing he already learn a lesson she bring a glass full of water with leaf floating and said "Release hatsu"
After jack started to release hatsu in the glass and water started to spill out and glass shattered completely seeing this she said, " you are an Enhancer" after saying that she draw chart of how 6 types of nen correspond to each other.
After showing this she raised a finger seeing this he got confused. she ask him. "Did you see anything " hearing this in his mind suddenly clicked and he started to concentrate aura into his eyes he said "0"
"Too slow give me 1000 push-ups and from now on whenever i raise finger i need as fast as answer as soon possible if not i will increase your push ups every time you answer me slow"
"Now you are an enhancer but i don't want to train you entirely on enhancement i want to train you in all categories as you are very talented in nen and i want you to be flexible nen user and let me told you never think you can beat anyone nen is always unexpected"
After that she started to train jack in every categories she got more motivated when she saw jack started to learn faster and better than everyone.
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6 Months later
Jack has already learn Biscuit has to offer all he need right now is some battle experience in using nen. He is already planning to get out of here and go to Heavens Arena for battle experience and get some money . While he was thinking Biscuit come near him and ask
"Where are you planning on going now"
"Well i was planning to go to Heavens Arena to get some nen battle experience and get some money"
"Okay Good Luck "
Seeing they are gonna part ways here jack bowed 90 degree and said, "Thank you for teaching me nen if you someday need my help i will come to help you if needed" After that he started to toward nearby city to get to the airport and get a airship towards Heavens Arena
Seeing his back she started to smile then disappeared in the hut.
After jack made his way to the airport he got a airship to the Heavens Arena. After getting into airship he started to think about hatsu he still doesn't have any nen ability. he still doesn't have any idea but he will need some battle experience and see different abilities so he can at least have an idea for his hatsu.
After 1 day airship landed jack got outside and made his way towards Heavens Arena. When he entered he saw long queue so he sneakily made his way to the counter, there receptionist handed him form and ask
"Please Fill In the details"
After filling the form i handed her form then she check information on computer after 10minutes she smiled and said "Welcome to Heavens Arena"
Jack enter and saw there are many people and sat there meditating after sometime he heard, "No 555" hearing his number get called he made his way and saw on stage a very fat and big man.
Fat man saw a kid on the stage and smile Evilly and said, "kid forfeit or i will break your bones very slowly"
Jack who heard this and only smirk while looking at fat man. seeing his smirk he run very fast and shouted. jack doesn't do anything and just punch powerfully on fat man belly. Just with one punch he flied outside ring and crashed on the wall fainted there jack only use small amout of strength without using any nen, whole arena got silent seeing this Judge gave him ticket and said, "No 555 go to floor 60".