There is no *general* right answer.
But, there is a right answer *for you*.
The best choice is the one that lets you achieve your computation goals in a manner that you understand.
Nobody here can decide that for you. Nobody here knows what you like or don't like. We don't even really know what goals you want to reach.
My favorite distro is coming to an end. I'm a big Lubuntu fan (and I'll explain why momentarily) but they're converting to LXQt and my preferred DE is LXDE. (It's insanely fast on modern hardware.)
Why is Lubuntu 18.04 LTS my favorite?
1. It is in the Ubuntu sphere, meaning tons of support and software choices.
2. It can be made to look stunningly beautiful.
3. It's actually very simple to use and maintain.
4. It gets out of my way and lets me get my tasks done.
5. It's stable. I don't care about new and shiny. I care about it working as expected.
So, for me, Lubuntu is the right answer. My answer isn't going to be the same as your answer. You get to decide what is right for you. The only way to do that is to try them. You don't have to settle on a single distro at first. You get to poke around, learn, grow, and change your distro as often as you want to.
And that's one of the things that makes Linux great...