All I can say is read up as much as you can about steroids before you try them, i.e, what each one does best, what the best stacks are for given purposes, what are safe amounts, the side effects and dangers. Even so, you will find outdated as well as conflicting information. Over the last few decades, there has been a chill on steroids research, so getting good info on some of the steroids is difficult. I feel that just casually asking around is not too helpful 1) because people react differently to (different) steroids for a number of reasons and only apply to the person speaking; 2) because much of what you hear is purely hearsay and anecdotal. many people simply repeat the same information that's been floating around the gyms and the web for years and it isn't necessary correct. Commenting on orals, yes, they are generally rougher on your liver and you must take them for shorter periods of time than injections. Honestly, if you could find a doc to help you that would be great. But in the US, it's unlikely and, in my experience, most docs don't know anything about the use of steroids for anything other than therapeutic purposes.
As to finding steroids, you are just going to have to nose around and, ultimately, decide if you can trust a source. No one, especially in the US, is going to tell a stranger openly where to get them, unless it's some loudmouth, braindead meathead at your gym. For all you know, it could be a sting. Steroids in the US (where you are) are illegal and you are risking getting busted if you import them from an overseas source. Overseas senders don't care, but you might if you end up as a guest of the government. That being said, most of the stuff from overseas actually does get into the country. The DEA and customs aren't as effective as they'd like you to believe. Wherever you get them, locally or off the web, you can get scammed. You really need to know your stuff to know if you are getting real or bunk gear. I probably should mention scammers don't give refunds. Also, expect to overpay.
Sorry to be depressing, but that's the reality of the situation.