if you want to continue using wireguard, then pay attention to Warp from Cloudflare, I know that it is a little unfair, but it is stable, and it is a clean gateway without restrictions, which you can use for your further connections,
if you want to use ipsec from Proton, then
a) find the configuration for Proton, exp ProtonVPN on Mikrotik - #15 by newbeen
cert(if needed) https://protonvpn.com/download/ProtonVPN_ike_root.der
b) name and password, taken from the personal account of proton
c) server address, taken from the server address in the configuration for ovpn
you can also pay attention to other analogues, for example, nordvpn or purevpn, they also work well with mikrotik