It's one of those things that required serious patience and effort.
I have a long history of singing and music, so already having skills on voice placement, a good ear, and how to practice scales, arpeggios, vowel shales, and so forth has been invaluable.
But, also, I am lazy!
I go through spates where I put a half an hour a day into it or more and spates where I don't do much at all. The results? Some tiny baby steps of progress.
You need to temper your desires and expectations with reality and limitations. Set your bar low on the 'pessimism' scale but (important) practice anyway! You'll be surprised by the progress, even if it is tiny.
I have no allusions that my voice is or ever will be 'passable', but it certainly can be 'blendable'. Frankly, that satisfies me. More work to do, gotta stop being so lazy! Lol
