Getting a blog to be multilingual

Hello all!

I am starting a blog on Hardware and since I already speak 3 languages myself I would like to be able to offer my posts in all those three languages to my followers. I have already installed WordPress, and i have installed the nlingual plugin, but as I am not very tech savvy I just can’t get it to work. I have googled for hours, I have checked the forums but i cant find anything relevant.
I definitely dont want several languages in a single post, I would also like the whole website to change language along with the post.
Does anyone have any tips to realize a multilingual blog?

Though this I doubt that it will help anyone here is the blog as is: hardwareblogger

Kindest of regards,

JoostG