You should never trust your information with a 3rd party, ever. For the extra few seconds it takes to encrypt your details you would be stupid not too. If you are having trouble getting to grips with PGP there are some really good threads on here where you can get help and useful information. Do not give up because it is proving to be a challenge, it's a challenge worth persevering with, possible the most important challenge of them all. Encryption should be used for the transmission of all identifiable information.