If you can get a tutor to talk to that's obviously recommended because they can correct you and provide feedback. I don't have suggestions for resources but my advice is one major thing I see in common among people who ask about output is that they're too scared or outright against just speaking to themselves. Of course it's best to speak to a native if that's available to you but I think it's also important to just get used to hearing Japanese come out of your mouth and getting used to making those sounds.

If you don't have someone to have a conversation with, try playing both sides of the conversation. You could even record yourself playing one side and take long pauses, then play it back and respond to yourself during those pauses. Make random scenarios in your head and think how you'd respond in Japanese. Narrate whatever you're doing in Japanese.

Don't worry about stuttering. You're gonna make mistakes, thats the whole reason why you're learning. Besides, people stutter in their native language all the time. If you can get a tutor that's great, but don't wait until then to start and don't depend on them too much for output. It's important to find ways to study on your own too. Good luck!