For several years Open Science requirements and recommendations have been part of the grant agreements of European projects. The European Commission supports Open Science practices to increase the visibility, impact and excellence of project results funded through its funding programmes. The first calls for Horizon Europe were published earlier this year and Open Science is now embedded in it, meaning that the requirements are implemented throughout the Horizon Europe work programmes, in all stages of the project life cycle, from proposal to the final stages of the project. Researchers from across the spectrum of organisations will have questions on how to comply with these requirements and in this workshop we will address the different obligations and discuss best practices and approaches, with special attention for new aspects such as the evaluation of Open Science at the proposal stage. We aim to scale up Horizon Europe support, and together we want to train more people, produce collective materials and exchange ideas and experiences. In this interactive workshop we aim to discover answers, collaborating with the target audience. The workshop will be coordinated and delivered by members of the OpenAIRE Training Community of Practice of Training Coordinators.