> I am worried that I will f' it up again (self-fulfiling prophecy?).
Self-fulfilling prophecy is a possibility, but it’s not inevitable. You’ll want to watch yourself closet to avoid letting worries and anxieties get in the way of getting things done.
There are many resources for self-management of ADHD symptoms. Most patients benefit from these strategies regardless of medication status.
I’d suggest starting with something like a Pomodoro timer app. The idea is that you work for something like 15 minutes and then take a 5 minute break, then repeat. Set a goal of doing something like 10 Pomodoro sessions (minimum) each day, and get to work. It’s much easier to manage time in short intervals, and to break problems down into manageable pieces.
Identify your distractions. If you spend too much time on certain websites (HN included) then get an app to block those during working hours. If you can’t trust yourself, then don’t leave it to chance. Shape your environment to encourage you to focus.
Communicate with peers and your manager. Write a short status report every day to your manager if it helps. Or just write it to yourself. A cadence of accountability goes a long way.
Support groups are hit or miss, especially online. Some of them have helpful tips, but some of them turn into another time wasting venue. Rule of thumb: If people are doing more venting or complaining than sharing helpful tips, close it or add it to your block list. You don’t need it.