you dont really need an tutorial for that its just an learning procress but a can you give an advice for painting : just for what you want to archive u should open some reference for it but not for copying it but for taking little information of it maybe on reference, when we take the topic the waves for example, you love tho foam and the other on the forma of the waves are interesting. in the painting process itself it is important todo your strokes like the structure of your topic is, hope this helps you a bit btw the most important thing is learn as hard as you can redo studies over and over again and then everything comes naturally wish you all the best by your painting process.