don't be concerned about weight for the moment... if you're struggling with a heavy fixed freestyler try to start on bmx to build up your strength and built up to it or maybe a 24" dmr sidekick or something, no reason why you can't build up a little jump bike fixed gear although be careful to get your gearing right!
what everyone else has said -
don't be concerned about weight for the moment... if you're struggling with a heavy fixed freestyler try to start on bmx to build up your strength and built up to it or maybe a 24" dmr sidekick or something, no reason why you can't build up a little jump bike fixed gear although be careful to get your gearing right!