Heard bishop is a good choice as a first character to fund my end-game character, is HP washing necessary for the "mule" Bishop? Still deciding for my end-game character choice but will probably be a BM, Hero, Paladin, Drk, or NL, and preferably HP washed just for min-max purposes hence the need for funding.
You don't really need to hp wash the bishop, at least not until lv 150+. Starting with a bishop is really good since you can leech (way to earn mesos) and you are really important in most bosses (for HS / Ress). Also, you can self leech later the 2nd character and so on, so you save a lot of money by that. HP Washing a bishop is really easy and don't require much. I'd recommend this guide: https://royals.ms/forum/threads/bishops-guide-2022-horntail-guide.125406/ A Night Lord is one of the most expensive classes, while DrK/Paladin don't require too much funding. Opening a Bowman would be a bit hard as well, as you do need some good amount of HP Washing. I'd recommend watching the "Class Guides" forum, so you can have a guide on each of these characters and decide on your own. Also - I don't recommend opening a Hero, since It's basically the weakest warrior class.
DW about asking noob questions - I asked a ton of noob questions when I returned playing couple of months ago. And yes - you are correct. You cannot log into 2 characters in the same account. You only need like 2 accounts anyways - 1 for the bishop and 1 for the other characters. If you plan on having multiple mules at a time, you might want to open more.
starting with a bishop is great and will come in handy later on for your actual main, although I'm here to suggest not creating a bishop right away, but start with your favorite class. one you can enjoy your first moments on this server and early stages of it. HP washing is a thing for attackers overall but definitely not a must. there are other ways to get extra HP later on : ).