Just keep doing...
The arts we teach have been developed over many many years, and the philosophy goes back hundreds (if not thousands) of years. Perserverance is one of the keystone elements to gaining all the benefits that Tai Chi and Qigong can offer you. When you take on a new class as a beginner, give it a chance... it may take several sessions before you start to recognise the benefits you are gaining from it.
If you're the sort of person who likes a challenge that keeps the mind fully occupied, and you are willing to commit to a long term project, then one of our traditional taijiquan classes would suit you well; and you will of course also gain all the health benefits as you practise. These classes also progress to practising partner work, which is very useful for learning how to be mindful and relaxed through personal contact.