This Astrochemistry Training School is organized by the COST Action NanoSpace (CA21126) in collaboration with the Dutch Astrochemistry Network (DAN). The current research programme (DAN-III) aims to generate new experimental and theoretical data that will aid the interpretation of astronomical observations performed by JWST. The COST Action NanoSpace (CA21126) brings together researchers and innovators from more than 47 countries and several industrial partners. NanoSpace proposes a highly interdisciplinary approach in order to understand the physics and chemistry of carbon molecular nanostructures in space, taking advantage of the successful operation of the James Webb Space Telescope (JWST), new ground-based facilities to simulate the interstellar medium (ISM), as well as recent developments in computational facilities and laboratory techniques.