I have tons of questions. Please help.

I'm new to hellenism. Like very new. I've been researching it over the past week or so. This is all really confusing for me. I've never been religious before, but lately, I've been really inclined to learn more about hellenism, the Greek gods, Greek mythology, etc. I've usually been a very 'if science can't explain it, I don't believe it' type of person, but not anymore. I think it might've started a month or two ago when I got a little interested in learning a bit about tarot and stuff, and I then started to think about the Greek gods and stuff like that a bit more until I started properly researching it a bit last week. I'm not sure if my interest is just because of my friend talking about it a lot (she believes in the Greek gods and also talks about Percy Jackson a hell of a lot) or if this is a sign from the gods. I'd really like to communicate with the gods to try and get some answers, but I don't know how. Like I've said, I've been doing research, but I don't have things like pendulums or tarot cards (my mum has tarot cards but I dunno if I wanna bring this up to her until I'm actually sure) and a lot of the things I've seen say that you need to cleanse things with like incense or candles, but I'm not allowed candles because my mum is really afraid of the house catching fire or something (I'm like a young teenager so I still live with my parents), so I'm not sure what to do. If someone could please help answer some of my questions, I would really appreciate it. Thank you for reading that lengthy ass paragraph if you did :)

Edit: Another question: Are altars necessary? I don't particularly have space for one. Also, is there a certain way to know which deity - if any - is trying to reach out to you?