25, haven't held a job, no friends and so on. I still have financial support from my parents, though. Is it a good idea to go to a cram school so I can move on to college at my age?
any age when you feel ready is a good time to go to college... i didn't go to college until i was 27, then i went back again at 33 for a different degree. college is awesome, and age makes no difference whatsoever.
You are one of the luckiest to have financial support from you parents but yes It's a good idea to go to cram school so that you can move on to college at your age and >>2 is right about it also.
OP, if you ever have doubts about going to College, take a job washing dishing and consider doing it for years. You'll suddenly want to go through all the painful bits of College in order to get a degree, on that note, College is a great place to meet people and learn new things.
I would recommend you consider what goal you have in mind before going to college. If you don't know what you want to do, consider getting a job first; actual work experience is far more valuable than a college degree. Even if it's flipping burgers, if you work hard and impress the right people you could get Assistant Manager, which while still a crap job looks vastly better on a resume than nothing.