It's a good start but you're right about using too many lines, if you're not careful you might get into bad habits. It can make it hard to see the pose. I did this a lot when starting gesture drawings too, and find it helps to stick to 1 - 2 minutes per pose, as it starts to sink in that you don't have time to make that many lines! If you practise a lot, even for a week, you do get more confident and less worried about making every drawing accurate. Try to stick to one line, you can look up "ghosting" so you imagine the line before you put it down, otherwise just commit to the line and let it be incorrect. Your brain naturally sorts it out the more you draw.
Your work has a lot of life to it and doesn't look stiff, which is great! I like the left one on page 5 the best, the line of action is clear and the legs look more confident.
I set a timer for 25 minutes when I do these, and then take a 5 minute break. It might be worth timing yours to see where your concentration stops and make sure to take breaks. Even if you can only concentrate for 10 minutes, don't worry! Lastly, have you seen the Proko gesture tutorials on youtube? He's great at breaking it down really clearly.
