ronin - for someone who’s been a member here for more than two years I shouldn’t have to remind you of the search button. I just did a search for “correct curve” and found nearly 100 threads with those two words in them. You should be able to do the same. Also, the forum software does an auto search when you post a thread for other threads with similar subjects. The list of those threads can be found at the bottom of the page.
Even though I’ve given that advice myself (jelqing against the curve) there are so many reasons for a penis to be curved that one solution won’t fix them all. So far I’ve only read of a couple guys here who have had moderate success in straightening their curves by manual methods. Read through some of those 90+ threads for other ideas and let us know if you have any success.