G'day Lisa welcome to PA. Depending on your location do a search for Lapidary Clubs and join one close to you. Most if not all will include field days in their itinerary along with the club rooms to try your hand at anything and everything Gem related. I know the Bendigo Gem Club have field days, have a look at their website they've got a Gem Expo coming up soon from memory.
Just saw the expo is scheduled for the 19th and 20th February, best to contact them to confirm. Covid has seen the last 2 cancelled