a few simple beginners

good afternoon, I’m just a newbie who bought hap ac lite and let me ask you a few questions:

1 - I downloaded the mikrotik application from the appstore for ios and I really liked it, can I also use it to connect and view my router via the Internet or is the connection to the router in this program not protected and is it not secure?

2 - I configured the network through the network master as a simple home router, where ether1 is a wan port with a ppp connection to the Internet, and the rest of the interfaces are bridged. the question is, how can I create a rule in the queue tree so that all connections from a computer in the local network to a specific address on internet, for example 5.112.31.201, have a higher priority than all others

I understand that you need to first create a magle rule where you specify the destination address 5.112.31.201 and mark the packets, and then create 2 queue tree rules with a higher priority (exp priority 4) for marked packets and with a normal priority (exp priority 6) for no-mark packages

if my reasoning is correct, how to do it?