How do I keep money in USDT?

I'm new to the world of cryptocurrencies and I've heard about USDT, but I'm not sure how to keep my money in it securely. Could you please explain the process to me? I'm a bit worried about security issues and want to make sure my funds are protected. Also, could you recommend any reliable wallets or exchanges that I could use to store and manage my USDT? Thank you so much for your help!