It is not a good advice to be introvert so long as you are also careful with details and traps which might expose you shall you choose to be extrovert. Your sociability is a given since you take part in group activities which will most likely give a fillip to your career. Perhaps you need to spend time among friends but this will reduce the time you spend for other activities. Truth be told, you try to gain time so as to avoid committing to decisions and actions which will add weights to your shoulders. You can do that but you need not look for excuses. You can simply ask for more time but you must make it a rule to operate thinking about the future. The race in which you participate is not a sprint anymore; it is rather a long-distance track which will speed up at some point and you must follow the new rhythm.
For a thorougher analysis, do not forget to also read the predictions for your Ascendant