Do your part. 
Unless you want to pay someone to have your fun for you, learn about the hobby. Read books and magazines, watch videos and go to the field and watch people fly. Explore the internet for information. When it comes to this hobby, I have a saying
" Ask 6 people the same question and you'll normally get 6 different answers. When all 6 agree, it's probably a fact".
If you participate in an online exchange of information, please only make comments on things you know to be a fact. Don't repeat something you heard or make something up. If everyone followed that advice, the internet would be a better place. As is, it's up to you to separate the fluff from the facts.

Find the right person.
When you get to the field, watch quietly. You should be looking for someone who flies a lot, has good equipment and seems to have at least some social skills. This might not be the best flier or the guy with the prettiest equipment, but it should be someone who obviously knows his stuff. Take your time. This is going to be your mentor. Ask him some questions about his setup to see if he can explain some simple things. If not, find someone else. 

When you find someone, don't insult them.
If he gives you advice, follow it. If he helps you setup your helicopter, leave it setup that way. If you don't like the setup, tell him why. Don't go find someone else and have them change the setup. If you do that, don't ever expect to get any help out of him again. He might be some sort of saint, but generally nothing is worse than someone who flits from person to person, having his mind and setup changed daily. I remember a couple years ago, this kid was lucky enough to get Curtis Youngblood to work on his Concept for about 4 hours one day at a funfly. The next day, I saw him asking someone else if the setup was ok. While I guess there's nothing wrong with asking, I wondered what he would have done if the guy had said no. 

Don't blame someone else if you crash
Simple. It's your helicopter. If someone failed to tighten a bolt, you should have been there to catch it, or you should have done it yourself. You should inspect your machine thoroughly if someone else does work on it. If you ask someone to test fly your machine, it's your baby. If someone asks you if they can fly your machine, the machine becomes their responsibility. If they crash, they fix it. It's a good idea to make that clear before handing over the transmitter.