So i have a 3D printer, and i have linux on a laptop but im struggling to find good 3D print-related software to use on linux or maybe i havent looked hard enough? Im pretty much a beginner to both linux And 3d printing, also using Ubuntu Mate if that matters on a old thinkpad.

So i need a 3d print slicer/way to print to my printer, i also need a simple 3d modeling software (ive tried blender but found it too hard and heavy for me and my laptop). It would help if all suggested software were open source or something like that.