For some blogs and websites, even keywords with 0 monthly searches may be relevant.
My other blog – blackbeltwhitehat.com has built all of its traffic off KWs that Google KW planner says has 0 searches.
It all depends on how authoritative your website is and your competitors are. You can go after bigger, more popular KWs if you are a huge website with a DA of 90. It’s a different ball game if you are running a personal blog with a DA of 15
Try and include a number of the relevant searches in your articles etc.
Check Competitors & KWs Their Relevant Pages Rank for
If you have a tool like semrush.com,
Check what keywords competitors are ranking for.
If your head keyword is “football goals”, see who’s ranking top 5 for that term and see what other keywords the top URLs are ranking for.
If you don’t have an SEO Tool, you can just check the copy and meta title & description to see what keywords the top websites are trying to opimise for.