My other more random tips if you want to do painty/drawing type stuff (applies to a lot of other things too though!).
Don't be afraid to waste materials - I don't care how expensive they are, no art material is more wasted than the one that sits in the tube or the tin and never gets used at all!
Don't get bogged down in the 'why am I doing this' or 'who is this for'. You can do something to enjoy the process, to learn what the material does or how the tool works.
Don't think 'well so and so does that brilliantly so there is no point me having a crack at it, its their thing and they're great at it so the world doesn't need my version'... no one owns an art style/method/medium!
Most things have an ugly or frustrating and tedious phase - there isn't a single thing I have sold that did not go through a 'what the FUCK even is this' stage!! Keep going!
Whilst the saying 'a bad workman blames his tools' has some truth to it, you will frustrate and demoralise yourself unnecessarily by using cheap materials.
eg. if you're trying to work through some lovely, simple seeming tutorial say on wet in wet watercolour... but you're using cheap paint with not much pigment, on wood pulp paper that does not behave the same as heavy weight cotton paper, using duff brushes that don't carry the paint or move the way they should... you will NOT get the results you're hoping for, no matter how good you actually are!!
Buy good quality stuff - you can sell it again if you don't get on with it - people absolutely do buy slightly used second hand art materials IF they're good quality stuff.
Using painting as an example, six tubes of quality paint (three warm primaries, three cool) and a sample pack of decent paper (St Cuthberts Mill do sample packs) and three brushes will be a far far better spend than a huge but cheap tin of 24 colours and a big thick pad of shit paper and 10 crappy brushes from a brush set!