You may have already looked but I’d recommend Mark at Talkingbass, he covers lots of theory and tips from beginner to advanced and he doesn’t waffle on like some others
You’re not the only one, I don’t mind what wood it is but it has to be dark, darker the better really, I won’t buy a bass with a light coloured fingerboard , my Sandberg had an ebony board which is so nice
I’ve got the 4 string and they balance perfectly fine, the frets can feel further away at first but you adjust in minutes, really great basses in every way, GLWYS smanth 👍