OP, if you have a lump sum to invest, forget bank interest. You WILL loose money over time taking inflation into consideration.
Go to
www.imaraspreid.co.za and register. Send your FICA docs to them. It's a pain I know, but you will get over it. Deposit your money into your account. You will be registered on the JSE and will get interest more than any bank while you not investing.
Now it is easy as you can invest even with your cell phone. Or call your broker. Ask for advice etc. You will be allocated a broker that you will get to know personally.
Just do this. You will not be sorry. You can have a Managed Account that does well over 30% or pick your own shares.
I was with a Managed Account but now do my own and 60% PA is my average and expect to do better this year.