Here's a quick demo of how to knit in your tails as you go for both English (holding working yarn in right hand - throwers) AND Continental (holding working yarn in left hand - picking). Chapter markes below
For more knitting tips and tricks enjoy my books: https://pattylyons.com/books/
0:21 - one handed, over working yarn every stitch
2:06 - two handed Continental
4:04 - two handed Thrower