18 weeks & 3 days

So this is my 1st pregnancy & i’m 17 years old , so i’m fairly new to all of this stuff & I know some people say they can feel the baby kicking or moving around at this time , and I might be crazy & clueless but if the baby is a moving or kicking what does it feel like? i’ve been feeling tightness in my stomach & stuff that I don’t know how to explain 😂 somebody please help me 😭 i’m clueless & probably have been feeling the baby move or kick & I just don’t know it because I don’t know what it feels like or anything... please feel free to leave any helpful advice, thank youu🙂