You aren't going to find heroin man it no longer exists in the wild. It's all fentanyl. I have been clean for long stretches and started doing subs and fallen back into opiate abuse. Since you haven't done them I don't know if that would happen for you. Fentanyl is shitty, like heroin is better than Suboxone but fentanyl isn't. Even if you shoot it it's no better, just more intense. You will not find heroin. The strongest opiate you might actually find is oxycodone, which isnt that much better than Suboxone if you have no tolerance. Also you will have a hard time finding legit oxys. Suboxone is impossible to overdose on, it will just make you sick if you take too much, though there are breathing risks especially when mixed. It's a pretty safe drug to abuse to be honest, the biggest issue is it leading to addiction. It's just as addictive as all other opiates, although the withdrawals aren't as bad. It can be really hard to get off of, it's meant as a stepping stone for quitting heroin but that can easily work in reverse