Salcto

I have a stock 2003 banshee , I have t5 pipes and that's it , I'm looking to start with my suspension Nd taking off all unneeded weight and things in my bike. Also how long to extend my swing arm ? I wanna go to the dunes and race ( nothing serious ) and also go trail riding on a dry lake bed and mountain side ? Also what brand suspension would you recommend ? I have already jetted my carbs , ? What's next I am on a budget of 2k not knowledgable to much so I would need step by step info. Also where could I buy a complete engine ??? And I heard about this tranny where you don't use the clutch to shift what ind is it and is it worth it ??