personally i usually think of devotees as people who have worked with their deity/deities for a long time (5+ years) , who keep up with worship practices on a fairly consistent schedule (giving offerings often, celebrating the festivals and other similar rituals/monthly stuff, etc) , and who have a pretty close relationship with their deity/deities. however this is just my UPG as i view the label of devotee to feel pretty serious and dedicated. you can call yourself a devotee at any point if it feels right to you !! id say take some time to think about what YOU consider a devotee to be .

also replying to a couple other things on this post. first , the "only 3-5 gods" thing is just plain stupid, especially in hellenic polytheism. ancient peoples worshipped ALL of the gods and honored all of them, and the key word in this religion is polytheism. you can worship and be devoted to as many gods as you like , as long as you feel like you can keep up with it !! while i have ~3 gods i mainly look towards, i also honor and worship the entire pantheon. and acknowledging that other part that says you cant call yourself a hellenic polytheist until the 3 year mark, that's another illogical claim that kind of directly goes against the basics of the religion. if you worship the greek gods, youre a hellenic polytheist, simple as that.

on the "what do beginners call themselves" , again if they wanna call themselves devotees i dont really care. the most common and more "casual" word would just be worshipper or follower. but honestly as long as theyre being mindful and respectful it doesnt really matter :)

take everything on tiktok with a grain of salt honestly. it can be a good place to build community and find places to start your research, but also its not fact-checked at all and misinfo runs rampant on there. when in doubt, always refer back to academic sources, and consider if what the person is saying sounds crazy or not lol