Hi.
Have you tried the 3D Viewport Pie Menus and 3D navigation add-ons (in blender but not activated by default).
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https://docs.blender.org/manual/en/latest/addons/interface/viewport_pies.html
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https://docs.blender.org/manual/en/latest/addons/3d_view/3d_navigation.html
Both can help you change views without a numpad.
The Select Panel add-on features buttons to do that.