I have = Yesh lee
You have = Yesh leha/lah (depending on the gender of the person)
He/She has = Yesh lo / la
We have = Yesh lanu
You all have = Yesh lachem
They have = Yesh lahem
I feel like every week I am learning more vocabulary, but I begin to forget the ones that I have learned earlier, so I think the best way to remember all of them is to keep looking at the old notes and reminding myself how to say words in Hebrew.
I also realized that I started to form very short sentences like: I have white shoes ( Yesh lee naalayim levanim) , We have two black coats (Anahnu yesh lanu sney meilim shahorim) or she doesn't have a car (Hi en la mehonit ahat).