This is going to get rambly and preachy. I apologise, and it’s not meant that way.
I’d start off with just acrylics. Without a wet palette. Play around with paint consistency and just focus on painting neat. No overspill, everything painted one color. Do a few minis like that.
Then get a wet palette if you’re clear on paint consistency stuff.
Next up id try to focus on creating depth with shadows. I honestly think this is deceptively hard because washes are a crutch. So just paint shadows and midtone
After that, learn blending with whatever technique that fits with you. Glazing being common one.
After all that and 20 minis+.. at least you got the basics down pat and can go back to speedpaints if that’s more your jam but with a much better grasp on basics and therefore make gooder minis.
And yeah from that point just explore topics one by one. Highlights, shine, ambient colors, texture… etc
Long, sorry. GL:)