The first thing that you need to do is to remember that you are going to be the worst member of the Hapkido group that you might end up joining. In order to avoid this from happening, you need to put in a lot of time practicing before you can even think of joining the group.
Make sure you dedicate a fair share of your daily time to practicing your skills, or you could end up having a lot of fun made of you later on should you fail to do this.
Once you have gone on to practice enough and feel that you are ready to join the group you need to go ahead and scout your local neighbourhood to find any groups that are practicing Hapkido in the open.
This is going to be very hard for you to do, so remember to hit all the gyms and every area where you think they could be practicing it.
You can also check all the local forums and online discussion boards about Hapkido in order to get in touch with a group that you join.
Once you have managed to locate the group after a lot hard work and dedication, the next thing that you need to do is to go ahead and pass the initiation. Now this is going to vary based on what group you want to join, but you need to remember that in order for you to make it to the group, you need to pass this.