Watch the training. See if it manifests the original ideas affirmed by the founder of the art. Then decide if you are willing to devote time, money, and effort to your practice. Considering the complexity of the training and the fact that classes are generally offered twice a day, five to seven days a week, fees tend to be quite reasonable. Monthly dues at most major dojos range from thirty-five to fifty dollars.
Aikido training is an ongoing process.
Nevertheless, you'll go through a period of feeling quite clumsy. Take it as a natural and necessary part of the learning process. So don't even think about that. Just stay on the mat. You can eventually gain physical conditioning, flexibility, grace under pressure, confidence, a sense of community.