Ow guys, thank you so much for answering! I really appreciate it, and Im sorry Im just online again..

@Dannyhamilton, absolutely, yes I will choose one between electrum or multibit, I just used them recently so I need a little try and error before i decide which one im goin to use, thank you!

@Herbert2020 & @Dannyhamilton, Thats cool, I dont really know if "private keys" can do much farther than just securing our wallet. so from there, it means I can just easily "move" my btc from online wallet to my offline wallet without have to send them through our online wallet, right?

aright, this shoud be enough for me right now, thank you so much!