Ramadan (; Arabic: رمضان Ramaḍān, also known as Ramazan, romanized as Ramzan, Ramadhan, or Ramathan) is the ninth month of the Islamic calendar, and is observed by Muslims worldwide as a month of fasting (Sawm) to commemorate the first revelation of the Quran to Muhammad according to Islamic belief.
You must do Qadha and also do the Kaffara of deliberately breaking the fast which is either fasting two months continuously or feeding sixty poor believers for every day of broken fast. You also need to seek forgiveness for that sin.
Taharah is a real condition شرط واقعي in Prayers and fasting. Any worship which requires Purity (Taharah) is invalid if it was done with out purity.
If you could not learn basic rules of Ghusl and never been informed that Ghusl is obligatory in certain cases, which is very rare now a days, then the rule is different. But if you knew about Ghusl and it becomes obligatory in certain situations, and you did not know that it applies on you, and you fasted with out Ghusl, then you need to perform the obligatory Ghusl then perform every worship which was performed with out Ghusl.
You can read the verdict of Ayatullah Sustani as follows:
Ruling 1593. If a junub in the month of Ramadan forgets to perform ghusl and remembers after one day, he must keep a qaḍāʾ fast for that day; and if he remembers after a few days, he must keep a qaḍāʾ fast for all the days that he is certain to have been junub on. For example, if he does not know whether he was junub for three or four days, he must keep qaḍāʾ fasts for three days.
If you did not know, and you did not have the ability to educate yourself about these things, then your fasting is valid. Otherwise, you will need to do qadha.
ِAnd Allah knows best
If you deliberately broke any the fast of any day of the month of Ramadan, you need to pay Kaffara beside Qaza and Istighfaar. Kaffara for every day of broken or deliberately missed fast is feeding sixty poor believers. Feeding means giving them one meal of food or at least 750 grams of wheat or rice or any food item.
If broke the fast with out knowing that it is obligatory on you to fast, then just Qaza of the fast is enough.
You do not need to pay a kaffarah.
All you must do is redo that day as qadha`.
And Allah knows best.
The Hadeeth says: Best of deeds is the most difficult. Sharh Osool Al-Kaifi by al-Mazindarani (12:188).
It means that the reward of the good deed is more when it is more difficult.
The Prophet (SAWA) and his Holy Progeny Ahlul Bayt (AS) emphasized more on the 23rd night of the month of Ramadan. It is narrated that a Muslim from the tribe of Johaina (Johani) living far away from Madina came to the Prophet asking him: When shall I come to your Masjid in Madina for Laylatul Qadr as I live far away and can not come more than one night? The Prophet replied him as narrated: Come on the 23rd night of the Month of Ramadan. That is why, the 23rd night is called the big night of Qadr and also the night of Al-Johani.
This comes from hadith. Here is an explanation: https://alkafeel.net/news/index?id=6874&lang=en
However, all the nights are valuable and important!
If one had enough time, and intentionally did not perform ghusl before Fajr time, then their fasting for that day will be invalid, and they must redo that day as qadha` and pay kaffarah.
If they did not have enough time, or it was not intentional for them to stay in janabah, then their fasting is valid.
And Allah knows best.
There would not be any problem if you were to do this.
And Allah knows best.
Istihadhah can be minor or medium or big depending on the amount of the blood. In all these types of Istihadha, fasting is obligatory as well as Salaah, but after Wudhu for every Salah in the minor, or adding on Ghusl before Fajr in the medium or adding three Ghusls ; before Fajr and before Zohr, and befor Maghrib in the big Istihadhah.
Minor Istihadhah is when the blood does not fill the whole pad. In this case Wudhu is obligatory for every Salaah whether Wajib or recommended.
Medium Istihadha is when the blood fills the whole pad but does not leak out of it. In this case she must add one Ghusl before Fajr.
Big Istihadhah is when the blood fill the whole pad and leaks out of it. In this case she must add three Ghusls as mentioned above.
If you are Baaligh, you must then fast the whole month of Ramadan and not only twenty days. Your parents have no right to stop you from obligatory fast.
If you are still not Baaligh, then you should listen to your parents.