I can’t come up with words 🥲🥲

I talked with foreign friend two times.
First I could talk so so,but Second time I couldn’t talk fluently 🥲　I don’t came up with English words and topics.And I took mistakes elementary grammars.For example,“when did you start 〜？”,“How much money do you have?” and “where have been to〜” etc…
I need to spend more talk time with foreign friends.I want to go to abroad trip immediately 😗😗