Perhaps a day is not enough and you would like to spend a whole week concentrating on your painting skills. I can offer a couple of possibilities:
In 2020 I am working with Arte Umbria to tutor a painting holiday in rural Umbria for the fourth year. In 2019 it was a sell out! The setting is stunning, the food is delicious and the pool is cool. Its 3-10 July 2020 and you will need to go to their website for full details: