Writing Progress - How do I get started?

I had been thinking of taking up writing full time, mainly articles and blogs related to science. However, I haven't progressed at all in this regard because mostly, I'm spending way too much time in deciding the topic and ending up nowhere. As a writer who's just starting out and well, being quite lazy and suffering from indecisiveness, what could be some good places where I could find inspiration?

Are you writing for your own sites or are you offering a service to clients?

You need discipline, not inspiration.

How many words are you producing daily?

Start by reading blog guides out here, you’ll get basic ideas

There is no such thing as inspiration when it comes to content writing. You should keep repeating the prior sentence in your head until it takes root. Yes, content should be engaging and fun to read, but let’s face it, it’s not high art, and no one should ever think of it as such. Just make up your mind, sit in front of your computer, and start working on something. The more you write, the easier it will get, and the better you will become.
It really is that simple.
Good luck.

Inspiration Simple.. research keywords, make your writing mood, play your fav music in the background with low volume, and start writing...

Just start, don't wait for inspiration.

First time you need to read some books to get started

I am professional journalist and editor in my country and I think I have millions of words written behind in the last few decades. When it's up to writing you have two options: 1. You enjoy writing that much that you don't need any extra motivation or inspiration, 2. (most probable) You will need a discipline. The most important thing is to set a deadline to yourself. For example: Put yoursef a daily task to write one 2000-words article.
Beside my full time job, I set myself a goal to write, edit and publish one 1000-word article a day. At least. That's the minimum I need to do every day. It's not easy. For example: I am currently at the football match working as an official, I've been in the office the whole day and I will come back home at 10pm. After I eat and drink something, I will write my article. And go to sleep as I need to start editing and publishing articles at my full time job from 7 am.

Discipline, not inspiration