THE CHANCE FOR GETTING MY FIRST LAY

I went to live to my friend home which he have a hb5,5 (fuckable) sister. She convinced my friend to take me there cause my friend doesnt want me to stay there cause he have his sister there and he have a bitch/jealous character. He is toxic to my life and not a good company. His sister looks interested at me.which i completely ignored her for 4 or 5 years. Even "hi" i hardly said to her cause of my good honorable (bliax) boylish chracteristics.

Now i make bedroom eye contact and she looks positive to escalate things.

We went for holidays and she showed me a durex when her brother left for a sec. she said ~ do you want it?
~ *i pull of my hand too take it" and then she took it back teasingly

It's pretty obvious that she want me to fuck her. BUT I am unexpirienced even to kiss. I havemt kissed all of my life except of if i combine all my lifetime hours of kissing it would be less than 10 hours all and all.

What you suggest me to do to that situation ?