Hello @Robinn
I understood your frustration. It is possible but it's a bit tricky without any coding knowledge because a lot of work and selector adjustments have to be done manually. You definitely are on the right track tho because the element click selector has to be used here.
Here's an example:
{"_id":"inwerk-buero-de","startUrl":["https://www.inwerk-bueromoebel.de/buerotische/buero-schreibtische/buero-schreibtisch-inwerk-basi-mtb-bm692.html"],"selectors":[{"id":"click-1","type":"SelectorElementClick","parentSelectors":["_root"],"selector":"body:has(h1[itemprop=\"name\"])","multiple":true,"delay":2000,"clickElementSelector":"div.optgp-get > div:contains(\"Maße mm\") + div li label","clickType":"clickOnce","discardInitialElements":"discard","clickElementUniquenessType":"uniqueCSSSelector"},{"id":"price","type":"SelectorText","parentSelectors":["click-1"],"selector":"span[itemprop='price']","multiple":false,"regex":"","delay":0},{"id":"size","type":"SelectorText","parentSelectors":["click-1"],"selector":"div.optgp-get > div:contains(\"Maße mm\") + div li:has(input.validation-passed) label","multiple":false,"regex":"","delay":0}]}
Hope it helps.