Autism

Autism and ADHD are both conditions that effects lots of different parts of thinking and interacting with the world. In some ways they are very different, with quite opposing outcomes (people with ADHD often seek novelty and struggle with repetitive task, while people with Autism can find security in repeated activities) but also with a lot of overlap (such as problems with executive function, social interactions, etc.)

Because of some of the overlap, it isn't always easy to identify what is causing a problem, but usually if you explore the reasons behind the problem or becomes clearer. Are you struggling to start an important task? Is it because you literally cannot make yourself, even though you're really stressed and worried, and you're just sitting there looking at the computer? Or are you struggling to start because you don't know all the information you need to make a key decision, and you know that you need to, but both choices are equally balanced and it's impossible to just choose?

The finally, there is a moderate amount of people who are AuDHD, and diagnosed with both. They report very conflicted needs, a desire for novelty but finding changes exhausting, needing a routine but getting bored of it easily. If you're already diagnosed with ASD, you could read some stuff about AuDHD and see of any of it sounds relevant. But if it does, you really need to see a professional about an actual diagnosis, because it is not easy to decide what is autism and what could be ADHD. But on the plus side, treatment for ADHD is really and very effective for most people, so you might actually be able to get some help of that is a source of real problems for you.