Your computer is old and does not support OpenGL 3.2, so that's why you're getting the error. See https://emc.gs/t/84589 for more info.
I have a potential solution: install Fabric via my guide at https://waffle.coffee/fabricinst, and then install GLdown as found at https://modrinth.com/mod/gldown. I'm not sure if it will actually work, but it's worth a try.
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