Choose the topic that you are interested in and start writing articles around it. You can get started with wordpress for free. Starting a blog is quite easy, getting traffic and promoting the blog is where you'll find things getting difficult. For promoting the blog/SEO you will be able to find many tutorial in youtube.
Asking this here ? There is already lot of information about it here.
Read the forum here and you can also buy udemy courses on the subject,
Blogging is a good way to share my ideas, but I don’t know how to start. I think I should first pick a topic I like. Then I can make a blog using WordPress or another easy website. I think writing simple and helpful posts is a good way to begin. Sharing my blog on social media can help more people see it.
Read the tutorials and watch YouTube videos that are related to blogging topics.
It is quite easy as long as you have the passion for it, first thing that you should do is to understand the basics and explore why people do this. Next one would be to choose a topic that you would like to focus on at first then slowly tackle other topics in the long run. You need to know who your market is gonna be, because they will decide if you can continue blogging or not. The most important thing would be to choose your blogging platform carefully because this will enable you to have more visitors which means more people to interact with.
