Combined velcoities of earth's rotation and revolution + sun + galaxy

hey

since the earth turns around itself , turns around sun, sun turns around galaxy, galaxy is in movement (or maybe orbiting something bigger, who really knows ?)

Well with all these movements, our velocity must be close to c ?

thus , what is galaxy turns around ...., which turns around...., which turns around ...., ect

how can we really localise ourselves with dots that dont move (to measure true position + velocity), apart from just using starts really really far away ?