Spanish and French

So for Spanish learning the language. What I know so far is some of the words. But for a long time never knew sentences. Finally I decided to start practicing sentences. I figured since I am a cashier I need to learn since alot come in who don't know English.So this is what I know so far in Spanish. Hola Coma Esta's. The Customer says Bien,I say Muy Bien Back. Then I ask if the Order is Seperado or Junto's. Then I tell him the total in numbers and Dolares and then total in numbers and say Centado's. And then after I ring it all up ask Total. And then I say the change by dolares and centado's back. Then say Gracias,they say Gracias back then De Nada. I hope someday to be able to use Spanish past Customer Service but for now that's how I am gonna practice. Now For French I just know how to say Bonjour,Je'm'apelle Courtney and then ask for their name,and say Ca Va, Bien.  And I know some sentences. So far for French I know sentences and little words and I know the basic how to introduce yourself,and ask some questions. The problem with why I am not catching on to French not enough people to practice with.