OK lets resize this, the dimensions are pretty arbitrary unless you intend to have say a planet or a space ship, so I went with this, note the segments are upped to 72 as we will be emitting from this sphere I thought this would help, but I may be mistaken so I will do another run with a standard segment size, but for now set segments to 72 to give a good poly count

If we don’t do this well we wont have any points or polys to emit from but note we cannot change such things as segment numbers anymore

OK now for the particles, at the top of the screen choose Objects then object library and select a TP point emitter