The difficulty with stretching

Tonight I have to go to aikido, which I am sure I will enjoy after I get there this evening. However, I always worry before I go, especially because I am very slow at picking up the moves for anything. I have always had problems remembering the difference between my left and right sides and that makes it really hard to figure out what I am doing when the sensei demonstrates a move to me. I will get there eventually, but I am very slow along the way which is frustrating, especially since I am a complete perfectionist and want to do everything correctly as soon as possible. I know however that stretching myself is a good thing, physically, emotionally and that it is going to cause frustration along the way. Possibly doing all of this while simultaneously trying to learn a new difficult job is not my best plan but timing isn't always all it is cracked up to be in the real world. Mostly now I am grateful for how far I have come and that I don't have to get to the end of the journey immediately or all at once. I like running around with my friends, I like how my body feels right after I have worked out and it is covered in sweat, I like being an athletic person and not a couch potatoe. Mostly, I like myself and that is a new thing in my life. So, the times that I stretch myself and it is difficult are worthwhile and that is enough, even if I do have stress dreams about aikido now and then.