想學買股票，想問詳細方法？

Your question seems so broad and difficult to teach. My advise is for you to start from basics and equip yourself. You may do the following:

1) read finance section of newspaper everyday, and understand how news will affect the share price
2) study the graph of share price (what is good trend and bad trend)
3) do not blindly follow what the newspaper recommend you to buy, as sometimes it is a 'trap'
4) Focus more on those stocks which make top 20 up/down, and you will notice which are the stocks woth betting. See http://www.aastocks.com/chi/whatshot/top20delay.asp
5) Look for some beginner book on buying stocks, there should be plenty in book store

For brokage commission, the cheapest is 耀才證券 www.bsgroup.com.hk can be as cheap as 0.068%. Banks normally charge 0.25%. I been using 耀才證券 for long time, and find them quite reliable when paying such cheap brokage rate. However, they do not have stop-loss function.

Hope this helps!