Hi. You can start with the toaster ovens reviews, then expand to related topics. Just figure out what else might be interesting to your public and that can bring you affiliate commissions.

I am a toast/bread lover myself, so I would be very interested in content and product reviews about:
- Bread machines;
- Bread recipes;
- Spread recipes;
- Bread boxes;
- Bread knives;
- Cheese.

Also, just have in mind that Amazon will actually pay you a commission for whatever the referred visitors buy within 24 hours after they've clicked your affiliate link. By the way, this timeframe is extended to 90 days for the products they add to cart within the initial 24 hours.

You can even sell a course and/or ebook teaching how to make bread or practical meals involving bread/toast as the base ingredient, or how to harmonise different types of bread/toast with the main course etc.

As you can see, bread and toast are already a quite broad micro-niche with lots of opportunities.

A few reasons why I don't recommend you to start with something as broad as the whole kitchen:

1. The more generic, the more competition.

2. It doesn't really engage people to a new blog/YouTube channel. I mean, if you talk about toast in the 1st video and then bread in the second, your audience will be more engaged than if you talk about toast and then freezers (what doesn't mean you should not expand after building a following).

Also, it is good to have a marketing plan in order to figure out the most effective steps to follow to grow your channel/blog as fast and profitable as possible.

Give me a call and I can give you the proper guidance.

Regards,
Carlos.