How to enjoy my special interest in politics while sustaining focus and not causing myself stress?

In the past when I was regularly writing reports, newsletters, preparing training sessions and proposals I used a process which meant around 90% of my time was prep work, around 8% was writing the final document and 2% was editing.

Also having the right tools also helped. I used OneNote as my main note book, sticky notes on my computer for quick random note taking to be looked at later and either incorporate or dispose off later. And the 3rd piece of software I used was Grammarly for editing. All three are free, or have free options. I would then use Word, Excel and/or Power Point depending on what needed to be done, again other software some of which are free are availiable.

The first part was always mind mapping subjects, main subheadings. 
Then set up sections in OneNote, with suitable headings.

In the relevant sections I would use bullet points for my main ideas/thoughts. Nest in further bullet points for paragraph ideas.

And so I keep going on until I have practically written what I want before actually getting down to the nitty gritty of writing and putting it all together.

Once I have gone through these stages I would then write briefly what I want to talk about, a very rough draft version if you like.

Some of the advantages to this approach.
1. you are not at the writing stage, so nothing is set in stone. You are just collecting and organising your thoughts. Sections can be moved around, as can the bullet points. OneNote lets you link to pages in your notes, websites and other information. It is easy to copy and paste things in, like quotes, data etc.
2. by the time you get around to start writing I find I already know what I want to say.
3. this system is very flexible, so on a large project you can have a good draft copy of what you want on one subject while being near the beginning on other parts.
4. Writers block can happen any time, I find dropping one part and picking another by the time I go back the block is gone.

I am a huge fan of Grammarly and use the paid version both at home and in work. A couple of features I like is it will suggest alternative ways of writing some sentences which make sense, but it doesn't always get it right or the suggestion may just be wrong, so judgement is required. Also I find it flags passive sentences a lot. Personally I used to find rewriting a sentence so it was not passive challenging, and as it seems to often be triggered by key words I sometimes don't bother. The other is it will give you an idea of the tone of your writing.

One feature I like in Word is that you can have it read your writing to you. Spell checker is great, but won't catch if you have written the wrong word and spell it correctly. Even reading it yourself you may overlook it. Having it read to you I find is often the best way to catch these mistakes.

Hope this helps.