Fellow Welsh learner (and coach), Rebecca, has this great podcast around the topic of how to prevent the scourge of perfectionism from holding you back in what you are trying to achieve: https://www.academicimperfectionist.com/
It’s called The Academic Imperfectionist but, although primarily aimed at people in the academic world, there’s much good, generally applicable and useful advice for anyone wanting to make progress in achieving their aims (e.g. learning Welsh! 
)
John
PS Just a word of warning, though, about occasional use of strong language in the podcast in case you feel you might be offended by it