Where do I buy THETA?

Could you please elaborate on the process of acquiring THETA tokens? I'm particularly interested in the various platforms or exchanges that offer this cryptocurrency. I'm aware of the potential risks involved in cryptocurrency trading, but I'm looking for a trusted and reliable source to make my purchase. Could you also provide any insights into the best practices or considerations one should have in mind while investing in THETA? Additionally, are there any minimum investment amounts or fees associated with acquiring THETA tokens? Thank you for your assistance in guiding me through this process.