2 isp = 1 for gaming 1 for everything else

hello guys new here and just learning this routerOS, anyone can direct me to a guide how to set this up, i have 2 isp one is good for gaming but slow and one is good for everything else

isp1 = router is on 192.168.50.0/24 gateway is 192.168.50.1 (good for everything else)
Isp2 = router is on 192.168.100.0/24 gateway is 192.168.100.1 (good for gaming)

is thier a way to forward everything to isp1 and just use isp2 for certain game like cod warzone base on tcp and udp ports?
i would like to just use isp2 for selected games that doesnt work well with isp1 that i can add manually

i dont need load balance or fail over, and i dont think i need firewall because each isp modem is connected to a router already with firewall, right now what i do is just plug to which router i want to use and i think this mikrotik router can automate it for me , and my 2 routers i would like to use local static ip because i turn dchp on the isp2 router so i can plug it in the same network as isp1 and just change ip to use which one i want to use

thanks in advance

Not 100% sure, but perhaps you can mangle for outgoing traffic from the LAN heading towards those specific gaming ports (mark connections!!)
Then create route marks based on that traffic
Then create an extra route rule for ISP 2, using that route mark.