Wow, it looks really great. First I read “realism” and saw the red and I unfairly lolled a little. Then I read who you were going for and was like, “Yeah, that’s him. That’s definitely him.”
On the frontal, I think he has really really distinctive lower eyelids. His face isn’t quite so chiselled, almost sallow, and he has some Don Knots eyelid bulge going on where I don’t think you’re all the way there yet. But certainly good enough to be recognizable.
I think the lateral view is a little off. Do you have a lateral shot of the actor? Maybe working with a different view can show you different things.
Re: clothes, there’s kind of a better way, but it’s not easier, it’s harder. It’s to sew the panels together using cloth modifiers and physics. But Blender’s implementation isn’t the best, I think some other software can do it better.
OTOH, a lot of people do great stuff just by sculpting seams and wrinkles onto clothes, that might be more up your alley, particularly if you don’t care about topo or are going to just retopo it all anyways.