Hello Everyone! So i have a slight issue, I have coolant leaking, from what looks to be the O-ring of my water pump. Luckily i caught this early and my coolant level is still between the lower and upper in the reservoir.

My bike: 1995 CBR600F3

I've never done much maintenance myself, but would like to do this one.. is there anything i need to know in particular? Do i need to drain the oil before taking the water pump out? I was going to change the large water pump o ring as well as the smaller o ring (which is what i believe is leaking profusely), any other words of advice before i drain the coolant and begin this project? I have a service manual i was going to follow.. Would appreciate it!! Thank you