The first thing you want to do, after having started the game, is going into settings (Esc key) and turning on the "Trackpad Tuning" option. This will make you have to be more careful with short range movements when the hammer is close to the ground or terrain, but it will make your life much easier by making every jump in the game easier. The sooner you can get used to it, the better.

You will probably want to lower the mouse sensitivity further (even after the game does it automatically for you) after turning on that Trackpad Tuning option too. Up to you. It helped me.

I could have saved many hours and beat the game decently faster had I done/known about these things as soon as I started it out.