Hello!!! Thank you so much for the question. You can definitely do meditations to connect with the gods and goddesses and you also just talk at them and pray. Sometimes they even answer in cool ways! And no, I don’t believe you need an altar or physical offerings to practice Hellenism. If you really want to do that, though, you could always do an online altar! And write the gods and goddesses offerings on there, etc. I hope this helped!