>>1519154Your saw is pull only, in contrast to many carpenter saws which you can push and pull. So think about how you're using your energy.
The size of the teeth do matter. Smaller teeth are better for more dry wood. Larger teeth make fewer cuts per stroke but are ultimately better on live wood or anything with a lot of sap. E.g. the best designs for sawing tree trunks have extremely large teeth.
The quality of the steel does matter as well. Harder tempered steel does cut better, but if you have bad technique run a higher risk of breaking it, so it's actually good that you start with a shitty saw that will be harder to break.