Steps to take to ensure Android security? [closed]

I am aware that I should keep android up to date and have an anti virus like MalwareBytes. I also use VPN for connections. What other steps should I take to secure my android phone?

In addition, how can I check which apps are transmitting data?

(I also scan apps using the Play Protect).

If this question has already been answered in detail, could you link to it please?