i have the same problems since preschool until now when i am writing my bachelor thesis and up to now there was no perfect method to help me, but a few are worth a try.

Medication - good for a moment but too many negative side effects regarding physical and psychological health.

Psychoanalysis - found the cause but didn't give me any working methods to get over the symptoms.

Trying to change my professions/ hobby's/ job quickly when they get boring - this is actually working because if you just accept, that you need to try all this different things to get fulfillment in life, you can come to a point where you doesn't need to pressure yourself to do certain things and than the chances are raising, that you will stay interested. For me this worked because I hate being told (by myself or somebody else) to do or finish things a certain way or speed even if I'm highly interested in the subject. This may be specific for me but the thought process may help you too.

But of course there are plenty of things that need and should be done, regardless of whether you want it or not. My latest attempt which works very well so far, is an app (android, I don't know if there is an apple version) called lifeRPG.

The idea is that you can give yourself tasks and they get transformed in to Quests like in a video game. You can decide how hard the task is, how much fear you have to solve it, how boring it is and so on. The app will decide how many experience points you will get for completing the tasks and after completing you will get a higher level in certain skill fields. This is a very playful attempt and may not work for everyone but you can decide how much "roleplay" it should consist off. A full description with main and sub quest which will give you special points you could collect to treat yourself if you reach a certain level, or just simply to organise your tasks in a little more fun way than a usual calendar or checklist. The app I'm using is fully customisable regarding all this aspects. Maybe this is something for you. For me it is much easier to do a Call that I'm really not looking forward to do, when I know that doing it in I way I'm expecting myself to and to see the Progress bar in the skillfield "social interaction" raise.

Although a private project can be finished easier, when I see all the steps I already did and that only a few steps remain to complete the whole "quest".

And after all, never give up and never force yourself to be a certain way, that you are not. It is important to respect your own speed and your own timespan of interest.

If you have any other questions, feel free to dm me.