Whenever I upload an image (a drawn letter on an image editing program) and save the project as a font, there are spaces when I try it out. Is there anyway to fix the spaces?
What do you mean by spaces? The 4th (32) glyph in the font should be the empty “Space” glyph. The distance between the bearing lines determines the space between words.
Perhaps you are referring to the “white space” before (Bearing X) and/or after a character. You have full control of that by manually moving the Left and Right Bearings to wherever you want, or moving them for every glyph using Tools > Autometrics.
And BTW, the images are all 150 by height.
By “height” do you mean Bearing Y?
The size of the imported glyph can be adjusted by changing the import multiplier. Import Image > Glyph > Multiplier.