I need to 3d print this for school, and idk if I can when it’s hollow like this. Each time I make sm and use the pull button, it always makes it hollow like this, and I’m not sure how to fix this.
select the push pull tool, tap the control key if using Windows.
Please fill out your profile correctly, the info is critical to get the correct assistance!
From the screenshot it look like your geometry is a bit messy, I can’t notice it well but if it the bottom lines are flat, you can just draw a line connecting any edges and a face should be created.
More solutions could be given but we don’t really know what version of sketchup are you using, the information of your profile is incongruent. If you’re using a desktop version a plug-in could help you to fix your geometry. A laptop isn’t an operating system, there are four options for that, windows, MacOS, iPadOS or Linux, sketchup runs natively only in windows, iPadOS and MacOS.