Just got a launchpad-need some tips

I got a launchpad and would like to try using it as a step sequencer or to tigger clips/scenes.
I used the Duplex->Step Sequencer but everytime I push a note it plays the same instrument. How can I assign an instrument to a track in the step sequencer in Duplex.

Also looking at LiveDive and Cells. I got Live Dive to work, but I can’t decide if I should pay for the launchpad support. I can’t figure out Cells or GridPie.

Any tips/tutorials or other suggestions?
I am interested in BitWig but would rather stay with Renoise for performance mixing/arranging.