When you become professionally qualified and comoetent and when the client is satisfied o your performance fees will come. For the former part you have to do much home work. Wish you the best dear friend and welcome to the advocate brotherhood.
In this profession one can not think of fees only. Just built your practise brick by brick, as Rome was not built in a day. To be in the profession you have to live like a hermit and work like a bull. Fees depend on the status of your client as well as the nature of the case and there is no hard and fast rule on this, but naturally you can not work without fees but work hard and the rest will take care of itself.All the best.
Most difficult and most important question you asked. Fix the fee according to your needs and not according to greed, irrespective of how much capable you will become in legal profession (you will cetainly become a good professional). In the initial stages, you may not get the fee even according to your needs and allow you to develop a revengeful attitude against your clients and once you become expert, you start to take revenge by charging exhorbitant fee. Kindly put efforts not to develop these complexes.