Metroidvania

so, I'm completely new at programing... then, what is the best way to make a decent metroidvania game (example: doukutsu, lyle in cibe sector). I'm not saying I want to make a game worth to be compared to konami's games or doukutsu... also, is there any easy way to make good shmups?

start out making small simple programs, and as you get better start making more complex small programs.  they don't need to be anything useful really, just programming 'doodles'.

when you're learning how to program (and even after you're good at it) it's essential that you have people that you can go to with questions.  unless you know a lot of people in real life that are into programming, you're going to have to go on irc.  find a good community with intelligent, friendly people, and learn from them.   you will encounter problems that could stump you for a very long time if you don't ask for help.

you don't have to be a very experienced programmer to make a game like the ones you described, so once you get to a medium skill level, you can start work on it.