The Free Keyword research tool is as follows:
Google Keyword Planner
AnswerThePublic.
Ahrefs.
SEMrush.
Ubersuggest.

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Bing has a free keyword research tool, free backlink checker and free screen recorder: Microsoft Clarity - a full, enterprise level tool thats completely free. Google "Bing free seo tools" - click on the Primary Position link for more on how to use them! More on reddit.com

So I am going to apologize early for this being a longer answer but here it goes anyways. I have started just yesterday a 3 step process for keyword research. It is all completely 100% free. Now please understand that this method seems to be interesting for me and I am going to be watching how my final content appears with GSC. Step #1: goto keywordsheeter.com (not an affiliate link) and type in your seed keyword. This tool basically scrapes Google Search bar and instantly comes back with hundreds of potential keywords to use. Step #2: goto google keyword planner. You will need to setup an Adwords account if you do not already have one. Once inside the keyword planner, copy and paste about 250 of the potential keywords from keyword sheeter. Make sure that you have United States selected before you search those keywords. From those results organize them in a way that the results will display to you the searches with a minimum of 100 monthly searches. Step #3: Goto ahrefs. Scroll all the way down to the bottom of the page where it says Free SEO tools and click on Check Keyword Difficulty. If you are running a new blog then you are going to want to get the results that come up with an Easy rating of 0 - 9. Step #4: Start creating your content for those keywords. The entire process takes around an hour to an hour and a half. The reason being is because ahrefs keyword difficulty gives you a rating for organic traffic volume. Where as keyword planner is all about ad placement volume. Again I have just started this process for my new content so I cannot give you any kind of results that I have personally seen. It just seems like a more fun way for me to do keyword research. I sincerely hope this helps you. More on reddit.com

I don't know much about the services that offer keyword advice and I would be wary of buying the services of an 'expert' unless I had convincing reasons to believe they really know what they're talking about! I think it'd be smart to do a little research yourself. Whatever you're selling, look around at other shops that have similar products and see what keywords seem to be frequently used. Not to copy them - but to learn! What sort of words or multi-word phrases run through your industry? Look on the web too, not just Etsy. And even more - if a customer was looking for stuff that you sell, what terms / words would they use to search? It's the thinking like a customer that can be a toughie - but so useful! Hope you find the magic words that bring lots of traffic (and sales!) More on reddit.com