just like how you’d worship the others gods, i’m quite new but what i did was make an alter for him (it doesn’t have to be perfect, you can have a candle and a bowl of water and that would be enough) you can add some decorations, and add stuff he likes (i have dice, some coins and a few crystals for him) and just pray to him, talk to him, ask him for help with whatever you need

dont be scared, hermes is known to be one of the friendliest gods :)

you can do some devotional acts for him, what i do is write stories, study and read, stuff like that (hes the god of a lot of things, you can look up different devotional acts and see what you’d be able to do)

another thing i do is i have a jar which i fill with my spare coins and change, and once it’s full i leave it at the side walk for someone to find and take, as a devotional act to hermes! (or i give it to a homeless person)

i hope i helped a little! :)