Become Muslim first, then do not worry about your past

i'm a young girl, wanting to convert to islam, for me this religion is
really the truth. The problem is, that before i discovered islam, i
used to live a pretty wild life, I did a lot of wrong things (if not
all wrong things). I would like to know if it's possible for a girl
like me to convert, andwhat should I do regarding my past when
converting
Praise be to Allaah.
In the name of Allaah, the Most Gracious, the Most Merciful
"The revelation of the Book (this Qur'aan) is from Allaah, the All
Mighty, the All Knower.
The Forgiver of sin, the Acceptor of repentance, the Severe in
punishment, the Bestower (of favours). Laa ilaaha illa Huwa (none has
the right to be worshipped but He), to Him is the final
return"[Ghaafir 40:2-3 - interpretation of the meaning]
Ibn 'Abbaas - who was one of the companions of the Prophet of Islam
(peace and blessings of Allaah be upon him) - narrated that some of
the people of shirk (polytheism) killed and dida lot of killing, and
they committed adultery and they did that a great deal, then they came
to Muhammad (peace and blessings of Allaah be upon him) and said,
"Whatyou say and what you are calling for is good. If only you could
tell us that thereis any expiation for what we have done." Then Allaah
revealed the words (interpretation of the meaning):
'Say: "O 'Ibaadi (My slaves) who have transgressed against themselves
(by committing evil deeds andsins)! Despair not of the Mercy of
Allaah, verily, Allaah forgives all sins. Truly, He is Oft-Forgiving,
Most Merciful.
And turn in repentance and in obedience with trueFaith (Islamic
Monotheism)to your Lord and submit toHim (in Islam) before the torment
comes upon you, (and) then you will not be helped.
And follow the best of thatwhich is sent down to you from your Lord
(i.e. this Qur'aan, do what it orders you to do and keep away from
what it forbids), before the torment comes on you suddenly while
youperceive not!"
Lest a person should say: "Alas, my grief that I was undutiful to
Allaah (i.e. I have not done what Allaahhas ordered me to do), andI
was indeed among those who mocked [at the truth! i.e. Laa ilaaha
illAllaah (none has the right to be worshipped but Allaah), the
Qur'aan, and Muhammad and at the faithful believers]
Or (lest) he should say: "If only Allaah had guided me, I should
indeed have been among the Muttaqoon (the pious)."
Or (lest) he should say when he sees the torment:"If only I had
another chance (to return to the world), then I should indeed be among
the Muhsinoon (good-doers)."
Yes! Verily, there came to you My Ayaat (proofs, evidences, verses,
lessons, signs, revelations, etc.) andyou denied them, and were proud
and were among the disbelievers.'[al-Zumar 39:53-59]"
'Amr ibn al-'Aas was a mushrik (polytheist, idol-worshipper), a
sinner and an enemy of Allaah. He said: "When Allaah put the love of
Islam into my heart, I came to the Prophet (peace and blessings of
Allaah be upon him) to pledge my allegiance to him. He stretched out
his hand towards me, but I said, 'I will not pledge allegiance to you,
O Messenger of Allaah, until you forgive me my previous sins.' The
Messenger of Allaah (peaceand blessings of Allaah be upon him) said to
me, 'O 'Amr, do you not know that Islam wipes out whatever sins came
beforeit.'" (Narrated by Imaam Ahmad, 17159).
So flee to Allaah and knowthat there is nothing that you are worried
about, butthe solution to it is to be found in the texts quoted above.
Indeed, these texts are addressed to you; theyrefer to your situation
and contain the answer to yourproblem.
Your Lord is Most Merciful;He accepts repentance andforgives all
sins. His Mercy encompasses all things. Hecalls you and all His slaves
to repent and to become Muslim. He has promised you, through the words
of His Messenger (peace and blessings of Allaah be upon him), that all
of your previous sins, major and minor, of whatever type, will be
wiped out completely when you become Muslim, and you will start with a
clean sheet, a new record of deeds that is free of bad deeds. So what
are you waiting for? Why delay it any further? Hasten to enter Islam
and worship your Lord, and we give you the glad tidings of a happy
future and a good life in the shade of Islam. We were very happy - by
Allaah - to receive your question, and we are waiting to hear good
news.
For more information on how to enter Islam, please look at
Questions#703&11936 And Embracing Islam . May Allaah protect you from
allevil, for He is the Best of Protectors and the Best of Supporters,
and He is the Guide to the Straight Path.