I have fcked up communication skills

I am 19f and I have zero communication skills , I get nervous and don't know how to respone. Just few minutes ago I had a total mind blank nd idk what not. I just returned from market from bike riding with my big bro who has good communication skills . When we reached our house step some girls stopped to ask me about rent and all in our area . My mind went blank . First she asked if we live here on rent ? And I said yess??? Then she asked if any flat was available for rent in our house. And I got what not my mind said we don't want them here . I said oh it's not available here. She asked how much was rent and if we lived in 2bhk I said . Yess but couldn't give her a proper answer . I started sweating . I said oh rent in this area is 25k+ here. And mind my was like leave me alone idk anything.i live with my parents idk okay they handle things , I know I am an adult and look like a adult but I dont know how to communicate 😭😭. I was really like confused and nervous like I'm hiding something . And I still trying not to look panicked said ohh near the market there are places available for rent and I am pretty sure my lips turned white and my sweat must have been very visible.😭😭 They still would leave me , they were there to gather information and wouldn't leave without it. So me looking all panicked and nervous my brother entered the conversation and handled it . And they left . 😭😭 And my brother said to me what were u saying , why all nervous and all coz I kept repeating oh here in our house no floor or room is available . And all😭😭 i myself don't know why I kept saying that😭😭. Idk what those girls must have thought of me😭😭😭. I really need to improve my communication skills. But I think k i know why I panicked first I am not used to getting approached suddenly by strangers for their doubts other than where this place is ? . 2nd they asked me about my living place in front of the place I live so I panicked thinking why they asking me these personal things 😭😭.