To become a shareholder you need to have or open an account with a stockbroker which can be an online broker. Once you have done that the next step is to provide funds so the broker can accept an order to buy shares in AFIC (ASX code: AFI). Your online broker, stockbroker or your financial planner will assist you with what you need.
The ASX has a list of recommended stockbrokers which are available on its website: Website
Note: AFIC does not charge entry or exit fees when shareholders acquire or dispose of their holdings, although transaction costs will be borne when buying or selling through a stockbroker.