Dont worry about the language. English is as welcome as other language!!!
Don't worry about Algarve. You'll have a very nice time. In August you will find a very nice weather with lots of sun and high temperatures. Water temperature is also very nice.
Algarve has several spots along the coast. From Tavira to Sagres you and up until Carrapateira you will be able to find very nice and safe kite spots.
Ilha de Cabanas in Tavira and Ilha de Faro are two examples of nice spots for beginers. You wont want anything else after that
Relax and enjoy your vacations in Algarve. I bet that you'll want to come for the next years
PS -> Go to windguru and see statistics for Algarve (spots - Cabanas, Faro, Vilamoura, Alvor, Carrapateira)