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The best place to start would be code.kx.com where you will find a whole bunch of information on getting started with kdb+ and q; check out the ‘Intro Tour’ to get started.
Once familiar with the base language, you could then look into the Grammar of Graphics with KX Developer IDE to create some visualisations, then if you wanted to go a step further you could look at KX Dashboards Direct to create some dashboards for visualising the data.
Additional self-serve and on-demand training material can be found on the KX Academy and we also have a lot of useful threads across our various KX Community Discussion Boards.