>>5996021Grab Bargue's book, try to copy the plates (first section) as accurately and slowly as you can, and to understand what he's trying to teach you.
In parallel, try to grab one or two plaster casts and to make studies from it. Again, take your time. Try to understand what kind of process Bargue is choosing for his plates compared to what you intuitively do.
And take the habit to do quick ink sketches from life daily.
Once you're confortable with Bargue's first section plates, move on to more sophisticated drawings and paintings, by established artists.
IMO this is the best approach if you're really serious and motivated.
That being said, have a look at Cesar Santos or Stephen Baumann. They both have free content on YouTube and additional paid content, and received artistic instruction in Italy. Technically, they're quite good; artistically they lack, but most people do.