you could use dark basic pro, it'll take a while to learn, you will need patience, then you can start on a mmorpg like runescape, but I'm warning you mmorpgs takes about 3 years to code even with dark basic, if you think thats too long you could try a simple online game similar to runescape, like 10 players per world, summoner only has 4 per world, mmorpgs are the worst games to make, i've never tried but you are not the first on this forum who have wanted to do one, and they got loads of comments like the one i just made
Can anyone tell me the theory of knowledge?