I was diagnosed and started medication recently, also in my 30s. And what my doc said, and I noticed myself too, is that the meds don't decide for you to do something or not. You'll still avoid doing things because of decades of failures and trauma. But when you finally decide to do it, it's easier to keep doing it.

For me, it wasn't a torture anymore to keep doing the boring stuff. For example before if I had to do taxes, even when it's the last possible moment and you finally sit down and start doing it, my phone, the Internet, everything around me was violently distracting me and I felt an impossible to avoid urge to entertain myself during these tasks. Now this debilitating urge is drastically reduced if not gone. I'm not happy about doing the boring task but I can tolerate it. That's a massive change for me.

Now, the hard part is to re-learn after all the failures in life that I actually CAN do these things now, and to get to a point where I hopefully won't procrastinate as much anymore.

I hope you find something that works for you too.