Can a weak person learn kung fu? I want to master drunken style. I am fascinated with it. What are the basis of it? and are there any free online resources to learn it?
Drunken kungfu is crazy difficult. It requires significantly higher levels of timing, balance and coordination than most other styles. It may look foolish and easy, but it takes alot of skills to make it look that foolish and easy.
My suggestion is to start with another style first. Once you get the hang of basic stances and your coordination improves, maybe you can talk to your teacher about drunken kungfu. But really, start at the beginning. You don't polevault without being able to run and jump, first.
Learning martial arts online is not a great option. You will need live instruction, which you can then supplement with online instruction. You will also need to live spar, a lot. Hitting pads and bags can only go so far. You need a resisting opponent to determine if your stuff will actually work, and to improve it.
Stop in to your local MMA gym and see what they have to offer. Most will have Boxing, Muay Thai, Dutch Kickboxing, Brazilian Jiu Jitsu, and Wrestling. All great options if you're interested in learning to fight.