Replacing the nozzle is very simple and you should not worry about it of coarse be care full and remove the nozzle and place in a small vice use a heat gun, use a 7mm socket and the nozzle comes out its very simple don't listen to people who say it cannot be done it can and i would never blow money on a whole nozzle set as this is just madness.
https://www.amazon.es/boquillas-repuesto-impresora-Ultimaker-Ultimaker3/dp/B07Y1SLDQM/ref=sr_1_1?adgrpid=79138870219&gclid=Cj0KCQjw06OTBhC_ARIsAAU1yOWexesdG8jwcTbwwK88nB_E6KoGfFxPPN_q3w__zQlVgAJdRJ6dffQaAilhEALw_wcB&hvadid=385951204541&hvdev=c&hvlocphy=1005518&hvnetw=g&hvqmt=b&hvrand=4278137706886810072&hvtargid=kwd-64870313342&hydadcr=17406_1789321&keywords=ultimaker+nozzle&qid=1651061703&sr=8-1
just buy of amazon and do yourself if you need a tutorial or video pm me
