What instrument do you play? Or do you sing? The advice I give may vary slightly depending.
My advice is to start small. Just two bars, or just a phrase is a good place to start. Slowly expand these sections when they feel comfortable.
Next, it is a good idea to separate the rhythm from the notes first. Maybe clap out the rhythm you see and internalise that before looking at the notes. If you play an instrument, perhaps you could work on each hand separately first. Looking for patterns, such as repeated figures may help.
This may be trickier, but you may try to read one or two notes ahead while playing, which helps you anticipate and prepare the next note.
Lastly, stay patient and play at a slow tempo, any tempo that you can manage. Remember, consistency is key. It is much better to play slower and accurately, rather than faster and full of mistakes.
And thank you, I am quite fond of my voice as well, although some improvement can definitely be made. My favourite instruments are the piano, organ, and violin.