Well, itās true that generally you reach a point where you have most of the face, but it looks off and then you need a polishing phase that will help to refine the model.
However the basis is still the same, so if you feel that your character is somehow 70/80% there, but still itās feels off thatās probably natural.
If itās more 10/20% there , then you might consider starting over with a better basis.
That said, if youāre a beginner I suggest you to not mix too much learning and practical exercises.
Start by practicing modeling on existing characters/concepts, or try to follow the tutorial as close as possible first. Donāt worry too much about the end result but try too learn as much as possible. Repeat with different tutorial, or do the same a few time getting closer to a good result each time.
Once you are more confident about your skill, try do to something more personal. The focus is then more on the result than learning the technique.
It doesnāt mean you canāt use some tutorials, as they are a tool like any other.
But the tutorial should be more like a crutch rather than a walking system if you will.
All that might sound counter productive, but itās a beginner mistake to look to fast into getting good results or looking too fast for personal project.
Stuff like IDK 3D but Iām starting my game, short film and Iāll learn as I goā¦
Generally people doing so have very little chances of success.
My rule of thumb is that in order to be really successful you need to have at least 70/80% of the technical aspect figured out. So you can concentrate on the artistic side and learn the 30% remaining on the fly.
If you donāt have that right balance then itās better to practice and leave the artistic side for a while and focus mostly on technique.
Thatās a way to approach things I discover quite lately, and thatās generally not how beginner think.
To put that differently, youāll learn by doing and re-doing. In the beginning you want to redo as much and as fast as you can to get some mileage. So itās best to practice on subject that are not important to you.
If itās a personal project you might put extra effort to get it right, but itās also possible youāll have to start over later as you missed a bit of information early in the process.
For instance, if you want your character to be animatable there is a bunch of things to consider when building the mesh. If you donāt know them, at some point the model might look good, but at some point youāll have to start over so the model allow for correct facial deformation.
However when focusing more on technical aspect youāll be less invested emotionally, and if a character isnāt well suited for animation itās not a big deal, you can always pick another reference and build a new character to learn specifically how to make the face deform/animate properly.
Hope all that make sense !
Good luck on your learning journey, keep in mind that most of the time the hardest path turn out to be the fastest in the long runā¦