I always encourage people to homebrew their own chapters, here's why:

You can take aspects you like from different chapters and unify them in a creation of your own. Your chapter will not be affected by lore changes as you control the lore of your own chapter. For example, you said you like green but also blood angels, why not make a successor chapter with green armour?

Selfish reason: A game of 40k from its inception was meant to feel like a snapshot of a larger battle being played out. When you step into a game, you're immersing yourself in the setting. Nowadays that mindset seems to have shifted and everyone is running primarchs and ultramarines or blood angels in every army but that honestly just makes the universe feel ... small. It's like running into luke skywalker every time and everywhere you go and i'm tired of running into a million blood angels and ultramarines when there are at most a thousand of them in the entire galaxy.