It depends on what kind of SEO you are doing and what your goal is. Technical SEO you can use free tools, but if you go into content focused SEO you will at some point need a tool, many have free starting options. I used this as a starter not too expensive keysearch.co and I later switched to KWFinder but its a little more pricey. For learning ahref and moz or even jus a 1h youtube tutorial and then start trying.
It depends on what kind of SEO you are doing and what your goal is. Technical SEO you can use free tools, but if you go into content focused SEO you will at some point need a tool, many have free starting options. I used this as a starter not too expensive keysearch.co and I later switched to KWFinder but its a little more pricey. For learning ahref and moz or even jus a 1h youtube tutorial and then start trying.