Alright there Tesca. I can well relate to all you have said. For years I would stop and start things. Having a low boredom threshold and being somewhat temperamental in nature I suppose this is always a danger. I was always attracted to the Martial Arts and fighting if I'm honest! Having tried a few of the arts, Judo as a young boy, Tae Kwon Do and Muay Thai, I had Aikido in my mind. I really didn't know anything about it but the I just had in my mind that I was going to do it. From the outset I loved it. Aikido embraces a whole code of ethics, entailing respect, discipline, honour and integrity. What I would say to you Tesca is that it's never too late for change. If you want to do Aikido just carry on with it, pay no mind to how many classes you previously missed, concentrate on just going to all the future ones. As my Gran would say, what is for you in life will not pass you by. Whatever you choose to do, stick in with it.
All the best