Is this niche good for SEO

Hi all. I'm currently learning SEO and I have been advised to make a website where I can practice what I'm learning

I don't have money and so don't want to spend hiring a content writer.

I will be doing the writing myself. I plan on writing phone reviews as that is what I feel comfortable writing and have knowledge about

Should I go ahead making a phone review site for SEO or is there a special niche that employers want in a portfolio