Nice job! The proportions look good. You may benefit from slowing down a bit. Your lines are "hairy" in some places, which indicates unsureness -- which is totally fine and normal, you won't be sure of a line until you find the correct relationship to other lines. You want to keep your searching lines very light during this process and only darken them when you feel good about them. Slowing down will allow you to think about each line before you make the mark on the paper. Hope that helps :)

@Nivla to my eye, you did a FINE job capturing the forms. For example, the snail's body looks like it is wrapping down around the wood - without shading! Nice job! I think it is because you have varied thickness in the line around the neck area of the snail, along with that broken tapered line along the left hand side of the snail's neck. With the boots you did a great job of foreshortening. These things are hard to do. One of the things we are trying to do (I'm still fighting with it too) is to have confident lines, with less scratchy-ness. I personally like having some of those sketchy lines to start a drawing with to get proportion block in, but I try to make them lighter. Then, once roughed in, I erase them down a bit, and then try to have long, even confident looking strokes over them to better define the form. (I am not always successful) This is similar in concept to what you did with the boots. What if you drew the red sketch exactly the same... but you made the "over drawing" black lines less sketchy, and more smooth? How would that look and feel? BTW: when you have filled up that sketchbook, try getting one with a spiral bound edge. I find it harder to draw on a page that has that arch near the inner seam, and it doesn't make line control any easier. It might help. Keep going, keep at it!

Great first attempt @Nivla! The shape of the pear looks awesome. I think you could focus on designing the value shapes to help nail that depth of form. It may help to very lightly sketch in the value shapes before you start, and then begin with the darkest values first. That will help you set the foundation to organize your lighter values on. Hope that helps :)