Welkom on the ‘How to Get Started’ page of Blavaan. This page might have changed since you last visited. The tutorial on how to run a simple regression model in Blavaan can now be found here if you want to use Jags or here if you want to use Stan. We also have tutorials on how to run the same model, but in a frequentist way in Lavaan here and on how to complete the WAMBS checklist in Blavaan, respectively here and here for Jags and Stan.
For more, really a lot more, of information on how to use Blavaan please refer to this CRAN website.