Not sure how much you have on your first niche. Since you like the niche, i would keep your website. Leave it sit. You can come back to it later.

I would change and go with your new niche and create a new website since you have interest, experience and knowledge in it. That will help you to provide more in depth informational posts. That is a very good thing. People are not looking for surface help. Here are some resources you can use to find more questions people have about it. answersocrates.com and google search "people also ask" section in search results page.

The recommendation is to focus on ONE site starting out as it takes lots of effort and work get it going, however once you know what you are doing, then the learning curve would be less steeper to scale up.

You may otherwise be spreading yourself thin, unless of course you have a team or you outsource work.

You can because you are allowed 10 websites. Maybe you will get motivated later for the other niche, and it is better to have it and not need it then need it and not have it, Dora!

Jeff

I would advise that you focus on one until you get it running good and making good money (set a metric goal for yourself for that),

Then you can pick up the other niche is you still want to do that.

The concept is that you don't want to spread yourself too thin. As a mentor of mine once said. You're taking on too many goods and sacrificing the Great.

I hope this helps and good luck to you.

You'll get plenty of people advising you to focus on one niche, but I think expanding into another is fine and can help maintain interest in both as you swap focus between the two.