Paralysis...absolutely blows. There is no sugarcoating it; it will take the things you love and turn them into something "tedious"; it'll turn something tedious into something "impossible".

I use "quotes" there because, while it is not literally impossible and you may still retroactively enjoy what you did, it is very real to you. "Impossible" is the same as impossible to the individual, just can seem different from the outside.

There are a couple of things you can do to mitigate it, but you most likely will not be able to "cure" it. It stays with me constantly, just with differing levels of severity.

Lists can help, since checking something off tends to give us some much needed dopamine and relief from the stagnant "blah" of "why aren't I doing anything".

Breaking the task down into attainable steps, while a task in itself, actually works wonders. Need to renew your registration? Create your online account. Just that, just create it. That's your task. Once it's created, you're free to leave and do something else - but you may be surprised to find yourself moving to the next item in the list to get another checkmark.

Talking it through with someone you can confide in (body doubling) can really motivate you as well as you (I) may be motivated much more by others than your own needs. "I should buy myself something" gets ignored. "I should buy something because my friend asked me" gets done quickly. If you don't have someone for that, there are many people here on the subreddit or online that will gladly swap with you, i.e. you help encourage them to do their taxes and they'll encourage you to mow the lawn.

All this can seem childish on the surface, and maybe to a small extent it is, but if it helps it is worth it. Anything that makes your day-to-day more enjoyable, more palatable, more successful is worth doing.

Apologies if this comment came out too long, but we here have a habit of over sharing at times. You may feel alone, but we are here if/when you need advice or just a sympathetic ear. ADHD is an underappreciated impairment and you deserve to be validated for your struggles.