I've been working on first finger in first position and switching to first finger in third position for about a week or so, now. Yesterday, I starter adding some bowing technique to my exercises.
The Pirastro Wondertone Gold series, gut strings that came on Wednesday and the Pirastro Goldflex rosin that arrived yesterday (Friday) make life SO much easier. Not only do the strings sound better, they also feel better and more comfortable under my fingers. But SCIEßE they have to be tuned constantly, at this point!!!!!! My approach is to learn the first finger in jumping between first and third, and soon first, third, and fifth positions, before moving on to the second finger. After doing the same with the second finger, I'll add chromatics before moving on to the third and fourth fingers.
These are all reasons I am glad to be learning on my own. This approach may be lengthier, but I feel it will help me master different positions alongside developing finger coordination. What I'm trying to avoid is limiting myself to trying to play music, exercises, and scales almost-entirely in first position. This way I can in actual music (down the road) immediately begin working to avoid crossing strings and playing adjacent notes with the same finger and finding the easiest fingerings to move through entire passages smoothly. Not to mention, tuning accuracy is far more difficult to master when switching positions than when simply changing fingers in the same position.
It was also anticipated that most learning systems are designed for people new to music entirely, not just violin. So while I'm using methods as a reference, I'm more and more writing my own exercises and methods for each stage of technique.
On another note (pun not intended), the third position note(s) are SO much better, easier, clearer, and more-reliable with the Pirastro rosin and strings.